fix: rename misspelled props and various typos

[k0ndee]

Motivation

This is a follow-up to a review comment on #5099, where it was pointed out that Searchbar has a prop called traileringIcon, which is a typo for trailing.

This PR:

• Renames the misspelled Searchbar props to their correct spelling (breaking change):
  • traileringIcon → trailingIcon
  • traileringIconColor → trailingIconColor
  • traileringIconAccessibilityLabel → trailingIconAccessibilityLabel
  • onTraileringIconPress → onTrailingIconPress
• Fixes a batch of other typos found while scanning the repo, all internal-only (JSDoc comments, test titles, docs guide prose, an internal variable name, and docs-site-only code/data) so none of them affect the public API:
  • overridenTheme → overriddenTheme (local variable in Surface.tsx)
  • drawabale → drawable (JSDoc comment repeated across 9 components)
  • densed → dense, intefere → interfere (JSDoc comments)
  • desctiption → description, uncheked → unchecked, specifed → specified (test titles)
  • Screenhot → Screenshot (local function in the docs site)
  • elevarion → elevation (docs site theming table data)
  • platfrom, Additionaly, oficially, follwing (docs guide prose)

Related issue

Follow-up requested in this review comment on #5099 ("remove derived testIDs"). No standalone issue exists for this.

Screenshots / Videos

Not applicable, this is a rename/typo-fix change with no visual or behavioral impact. Component render output is unchanged.

Test plan

• yarn tsc --noEmit - no type errors.
• yarn jest src/components/__tests__/Searchbar.test.tsx src/components/__tests__/ListUtils.test.tsx src/components/__tests__/SegmentedButton.test.tsx src/components/__tests__/Appbar/Appbar.test.tsx src/components/__tests__/Surface.test.tsx - all suites pass, including updated Searchbar prop-name assertions and existing snapshots.
• Repo-wide grep for trailering/Trailering and the other fixed misspellings confirms no remaining occurrences outside of the docs/6.x migration guide, where the old name is intentionally shown as the "before" side of the rename example.
• Added a "Searchbar" section to docs/6.x/docs/guides/migration.md documenting the prop rename as a breaking change, with a before/after diff.
• docs/5.x (frozen v5 docs) intentionally left untouched.

[satya164]

Thanks