docs: fix duplicate code block syntax in example sections

[guesung]

Summary

• Fix duplicate markdown code block syntax (````tsx + ```tsx) in 5 documentation files
• Remove orphaned empty code blocks left after examples
• Fix tsxp typo in useNetworkStatus.md

Affected files

• packages/core/src/hooks/useMap/useMap.md
• packages/mobile/src/hooks/useBodyScrollLock/useBodyScrollLock.md
• packages/mobile/src/hooks/useNetworkStatus/useNetworkStatus.md
• packages/mobile/src/hooks/usePageVisibility/usePageVisibility.md
• packages/mobile/src/hooks/useScrollDirection/useScrollDirection.md

Before / After

Before	After

Test plan

• Verify code examples render correctly in VitePress docs

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[Copilot]

Pull request overview

This PR fixes malformed markdown fences in hook documentation examples so code samples render correctly (removing duplicated/open-ended code blocks and correcting a language tag typo).

Changes:

• Remove duplicate code fence openers (````tsx + ```tsx) and orphaned empty code blocks in affected docs.
• Normalize example code blocks to a single valid ```tsx fence.
• Fix the tsxp typo to tsx in useNetworkStatus.md.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/core/src/hooks/useMap/useMap.md	Removes duplicate/orphaned code fences around the example.
packages/mobile/src/hooks/useBodyScrollLock/useBodyScrollLock.md	Removes duplicate/orphaned code fences around the example.
packages/mobile/src/hooks/useNetworkStatus/useNetworkStatus.md	Fixes tsxp → tsx and removes duplicate/orphaned code fences.
packages/mobile/src/hooks/usePageVisibility/usePageVisibility.md	Removes duplicate/orphaned code fences around the example.
packages/mobile/src/hooks/useScrollDirection/useScrollDirection.md	Removes duplicate/orphaned code fences around the example (also reveals an existing Interface/signature mismatch noted in comments).

Comments suppressed due to low confidence (1)

packages/mobile/src/hooks/useScrollDirection/useScrollDirection.md:33

• The example destructures { direction, position }, but the Interface section above currently declares function useScrollDirection(): void; and doesn’t show the options parameter. This makes the docs inconsistent with the actual hook API (it returns a state object and accepts options.throttleMs). Please update the Interface signature to match the implementation/usage so generated docs don’t mislead consumers.

function Header() {
  const { direction, position } = useScrollDirection();

  // Hide header on scroll down
  const isHidden = direction === 'down' && position > 100;

[kimyouknow]

Thanks!