feat(cli): deprecate rules command in favor of skills

[stefanjudis]

Affected Components

• CLI
• Create CLI
• Test
• Docs
• Examples
• Other

Notes for the Reviewer

Deprecates the checkly rules command and removes the AI-context artifact it depended on.

Command (src/commands/rules.ts) — previously read the bundled
dist/ai-context/checkly.rules.md and wrote it into AI IDE config folders
(.cursor/rules, .windsurf/rules, .github/instructions, etc.). That
capability now lives in checkly skills, so the command is reduced to a
deprecation notice:

Rules were deprecated. Use `npx checkly skills`.

• Keeps its readOnly/idempotent metadata and is marked
  static state = 'deprecated', so oclif also surfaces a deprecation warning.
• Added a unit test for the message (the command had none before).

AI-context pipeline (scripts/prepare-ai-context.ts) — stops generating
checkly.rules.md and drops the now-dead heading/frontmatter helpers. Renamed
the misleading RULES_OUTPUT_DIR constant (it only feeds onboarding output now).

Release workflow (release.yml) — removes the step that attached
checkly.rules.md to GitHub Releases; the finalize-release job still marks
the release as latest. Updated CONTRIBUTING.md accordingly.

Left in place / for reviewer's call: the release job's
Save LLM rules as an artifact step (uploads the whole dist/ai-context/*
bundle as llm-rules-release) is now orphaned — its only consumer was the
finalize download. I kept it since it archives the full AI-context bundle, not
just rules, and its prerelease twin was already unconsumed. Happy to drop it if
we'd rather not keep dead archival.

New Dependency Submission

None.

[stefanjudis]

This part is here to make the rules accessible on the docs via a marketing site redirect. I'll clean that all up.

[Copilot]

Pull request overview

This PR deprecates the legacy checkly rules CLI command (which previously generated AI IDE “rules” files) in favor of the newer checkly skills flow, and removes the now-dead checkly.rules.md generation/release plumbing from the AI-context pipeline and release workflow.

Changes:

• Replace checkly rules behavior with a deprecation notice and mark the command as deprecated in oclif metadata.
• Update the AI-context build script to stop generating checkly.rules.md and simplify related helpers.
• Remove the release-workflow step that uploaded checkly.rules.md, and update release documentation accordingly.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
packages/cli/src/commands/rules.ts	Removes rules-file generation logic and turns the command into a deprecation stub.
packages/cli/src/commands/tests/rules.spec.ts	Adds a unit test asserting the deprecation message output.
packages/cli/scripts/prepare-ai-context.ts	Stops generating checkly.rules.md; renames output-dir constant; keeps onboarding assets copy.
CONTRIBUTING.md	Updates release instructions to reflect that rules asset is no longer attached.
.github/workflows/release.yml	Removes the step that downloaded/uploaded checkly.rules.md and keeps “mark latest” logic.

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