docs(react): use an action-first caption for the React overview

[Kevin-Liu-01]

what

Get Started and Quickstart captions should lead with the action readers can take. Several began with "Learn…", unlike the existing Install, Connect, Add, and Record pattern.

changes

• The conventions pass in docs: conventions pass — pointer parentheticals, action-led descriptions, lowercase project #520 has since made the Get Started, Quickstart, Platform card and section captions action-led on main, so this branch is rebased onto main and keeps main's wording in those eleven files.
• The one caption on those pages that still began with "Learn" is the React overview's description; it now reads "Choose the General Translation React library and quickstart for your framework."
• Explanatory body copy is unchanged.

validation

• Caption audit on the rebased branch: no description in a quickstart, get-started, overview, index or meta.json file under docs/en-US starts with Learn.
• git diff --check origin/main...HEAD is clean.

🤖 Generated with Claude Code

[cursor]

Risk: low. Approved. This is a one-line, easily rolled-back docs caption change with a small blast radius, and no present automated reviewer reported findings that need human review.

  

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