docs: capitalize React-specific concepts throughout docs

[Lanceiz]

Issue number: #6713

Summary

This PR standardizes the capitalization of React-specific concepts throughout the documentation, following the project's style guide.

Changes made

• Capitalized React-specific references to:

  • Components
  • State
  • Effects
  • Transitions
  • Context
  • Suspense
  • Error Boundaries

• Preserved lowercase usage when these terms are used in their general programming or descriptive sense.

• Updated occurrences across documentation pages to ensure consistent terminology and style.

• Left intentionally lowercase headings, identifiers, and code examples unchanged where appropriate.

Notes

• Blog and community pages were excluded as specified in the issue guidelines.
• Each occurrence was reviewed individually to distinguish React-specific usage from general usage, rather than performing a global find-and-replace.

[github-actions]

Size changes

Details

📦 Next.js Bundle Analysis for react-dev

This analysis was generated by the Next.js Bundle Analysis action. 🤖

This PR introduced no changes to the JavaScript bundle! 🙌