Skip prereleases for Homebrew tap and AUR, add lets-beta formula

[kindermax]

Problem

Prerelease tags (v0.0.62-rc1, v0.0.62-rc2) were published to lets-cli/homebrew-tap's main lets formula (and AUR), so every brew upgrade shipped a release candidate to all users.

Changes

• brews[lets] and aurs[lets-bin] get skip_upload: auto — goreleaser skips publishing when the tag has a prerelease indicator. Prerelease tags still create GitHub (pre)releases with binaries.
• New brews[lets-beta] entry with an inverted, templated skip_upload ({{ if .Prerelease }}false{{ else }}true{{ end }}) — prerelease tags publish an opt-in Formula/lets-beta.rb: brew install lets-cli/tap/lets-beta. The two formulas declare conflicts with each other since both install the lets binary.
• Changelog entry.

goreleaser check passes (config valid; the brews deprecation warning is pre-existing — migrating to homebrew_casks would force existing tap users to reinstall, left out of scope).

Remediation done separately

The tap's Formula/lets.rb was already reverted to v0.0.61 (lets-cli/homebrew-tap@7f36657), so brew users are back on stable now.

Verification notes

• .Prerelease renders to e.g. rc1 for prerelease tags and empty for stable, per goreleaser template docs, so the lets-beta condition publishes only on prereleases.
• The real end-to-end check is the next rc tag: expect lets.rb untouched, lets-beta.rb created, no AUR push.

Summary by Sourcery

Prevent prerelease versions from being pushed to stable Homebrew and AUR channels and introduce an opt-in Homebrew beta formula.

New Features:

• Add a lets-beta Homebrew formula that is only published for prerelease tags and installable via lets-cli/tap.

Enhancements:

• Configure the main Homebrew lets formula to skip uploads for prerelease tags and declare conflicts with the beta formula.
• Configure the AUR lets-bin package to skip uploads for prerelease tags.

Documentation:

• Update the changelog to document the new prerelease handling and lets-beta formula.

[sourcery-ai]

Reviewer's Guide

This PR updates the Goreleaser configuration to prevent prerelease tags from being published to the main Homebrew and AUR channels, introduces a separate prerelease-only Homebrew formula (lets-beta), and documents the behavior change in the changelog.

File-Level Changes

Change	Details	Files
Configure the main Homebrew formula and AUR package to skip publishing on prerelease tags, keeping stable channels free of release candidates.	Set skip_upload: auto on the primary Homebrew brew entry so prerelease tags are not uploaded to the main formula. Set skip_upload: auto on the lets-bin AUR entry to avoid pushing prereleases to AUR. Add a conflicts declaration on the stable Homebrew formula so it cannot be installed alongside the prerelease formula.	.goreleaser.yml
Add a dedicated prerelease Homebrew formula (lets-beta) that only publishes on prerelease tags and conflicts with the stable formula.	Create a new lets-beta brew entry with description, homepage, and license mirroring the main formula but indicating prerelease channel. Use a templated skip_upload condition based on .Prerelease so the lets-beta formula publishes only for prerelease tags and is skipped for stable tags. Declare a conflicts entry so lets-beta cannot be installed alongside the main lets formula. Reuse the existing tap repository configuration (owner, name, token, directory) for the new lets-beta formula.	.goreleaser.yml
Document the new prerelease publishing behavior in the changelog.	Add an Unreleased changelog entry describing that prerelease tags are no longer pushed to the main Homebrew formula or AUR, and are instead published via the lets-beta formula. Keep existing changelog entries intact.	docs/docs/changelog.md

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[sourcery-ai]

Hey - I've found 1 issue, and left some high level feedback:

• The templated skip_upload for lets-beta is currently quoted as a string ('{{ if .Prerelease }}false{{ else }}true{{ end }}'); consider making this a boolean template (without quotes) or confirming Goreleaser actually interpre the rendered string as a boolean to avoid subtle config bugs.
• You duplicate the repository and directory configuration for both lets and lets-beta brews; consider extracting these via YAML anchors or shared config to reduce repetition and make future tap changes less error-prone.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- The templated `skip_upload` for `lets-beta` is currently quoted as a string (`'{{ if .Prerelease }}false{{ else }}true{{ end }}'`); consider making this a boolean template (without quotes) or confirming Goreleaser actually interpre the rendered string as a boolean to avoid subtle config bugs.
- You duplicate the `repository` and `directory` configuration for both `lets` and `lets-beta` brews; consider extracting these via YAML anchors or shared config to reduce repetition and make future tap changes less error-prone.

## Individual Comments

### Comment 1
<location path=".goreleaser.yml" line_range="74" />
<code_context>
+    description: "CLI task runner for productive developers - a better alternative to make (prerelease channel)"
+    homepage: "https://lets-cli.org/"
+    license: "MIT"
+    skip_upload: '{{ if .Prerelease }}false{{ else }}true{{ end }}'
+    conflicts:
+      - lets
</code_context>
<issue_to_address>
**issue (bug_risk):** Template for `skip_upload` is rendered as a string, which may not be parsed as a boolean as intended.

Because this field expects a boolean, the quoted template will produce a string like "true"/"false", which may not be interpreted correctly and could cause prereleases to be skipped or uploaded incorrectly. Consider using an unquoted template that renders bare `true`/`false`, or a dedicated `when`/`prerelease` condition if supported.
</issue_to_address>

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[kindermax]

Addressed review:

• repository duplication — extracted via YAML anchor (&homebrew-tap / *homebrew-tap); goreleaser check still passes.
• quoted skip_upload template — intentional, no change. SkipUpload is a string field in goreleaser, not a boolean: the template is rendered first, then publish compares the string against "true"/"auto" (brew.go#L130-L136, L255-L259). A rendered "false" matches neither, so it publishes. An unquoted {{ would be invalid YAML (opens a flow mapping). Added a comment in the config so this doesn't look like a bug later.