docs(installation): list all framework adapters in intro

[kushaim]

🎯 Changes

The installation guide's intro paragraph listed only three frameworks — "TanStack Form is compatible with various front-end frameworks, including React, Vue, and Solid."

But the adapter table immediately below includes six: React, Vue, Angular, Solid, Lit, and Svelte. The intro was out of sync with the table, which would lead a newcomer to think only three frameworks are officially supported.

Updated the intro to list all six. One-line change.

✅ Checklist

• I have followed the steps in the Contributing guide.
• I have tested this code locally with pnpm test:pr. (N/A — docs-only, no code paths affected)

🚀 Release Impact

• This change affects published code, and I have generated a changeset. (N/A — docs only, no published code changed)
• This change is docs/CI/dev-only (no release).

[coderabbitai]

📝 Walkthrough

Walkthrough

The installation guide expands its compatibility statement to include additional front-end frameworks and their corresponding adapter packages.

Changes

Installation compatibility

Layer / File(s)	Summary
Framework compatibility statement docs/installation.md	The installation instructions list additional supported front-end frameworks and adapter packages.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Suggested reviewers: copilot

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly states the docs change: listing all framework adapters in the installation intro.
Description check	✅ Passed	The description follows the template and includes changes, checklist, and release impact with clear context.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[Copilot]

Pull request overview

This PR updates the Installation documentation intro sentence to accurately reflect all officially supported framework adapters listed in the adapter table, keeping the introductory guidance consistent for new users.

Changes:

• Expanded the intro framework list from 3 to 6 (React, Vue, Angular, Solid, Lit, Svelte) to match the adapter table.

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