Change `mdbook serve` to bind to 0.0.0.0 instead of localhost,
allowing remote access to the docs server. This is useful for
development environments like remote servers or containers.

Improve blockquote design:
- Increase padding and add border-radius for better visual appeal
- Add subtle box-shadow for depth
- Support GitHub-style alerts (Note, Tip, Important, Warning, Caution)
- Color-coded left borders for each alert type:
  - Note: blue
  - Tip: green
  - Important: purple
  - Warning: orange
  - Caution: red
- Better paragraph spacing within blockquotes

Usage:
> **Note**: This is a note
> **Warning**: This is a warning
> **Tip**: This is a tip

Set all border-radius values to 0 for a sharper, more consistent
visual style across all elements (blockquotes, code blocks, tables,
details, images, inputs, etc.).

Remove full border and box-shadow from blockquotes, keeping only the
left border accent. This eliminates the diagonal corner artifacts that
occurred when mixing thin borders with thick left borders at 0 radius.

Changes:
- Remove 1px full border (only keep 3px left border)
- Remove box-shadow
- Increase background opacity slightly for better contrast
- Cleaner look that works well with sharp corners

Bring back border-radius to fix diagonal border artifacts while
maintaining a cohesive look throughout the UI.

Changes:
- Set consistent border-radius values (lg: 8px, md: 6px, sm: 4px, xs: 3px)
- Apply to blockquotes (fixes diagonal corner issue)
- Apply to inline code (xs: 3px)
- Apply to code blocks (md: 6px)
- Already applied to: tables, details, mermaid, images, kbd, search

All UI elements now have matching rounded corners for a polished,
consistent appearance.

Tables weren't showing rounded corners because `border-collapse: collapse`
prevents border-radius from working.

Changes:
- Use `border-collapse: separate` with `border-spacing: 0`
- Add outer border to table element
- Remove duplicate borders between cells (only right/bottom on cells)
- Explicitly set border-radius on corner cells (first/last th/td)
- Add `overflow: hidden` to enforce rounded corners

Tables now have properly rounded corners matching other UI elements.

Move local workspace details from workspaces.md into new local.md page,
making it subordinate to Workspaces (matching SSH structure).

Changes:
- Create docs/local.md with local workspace details (worktrees, reviewing,
  filesystem layout)
- Simplify docs/workspaces.md to high-level overview with links to
  specific workspace types
- Update SUMMARY.md to include Local as sub-page under Workspaces

Structure now:
- Workspaces (overview)
  - Local (git worktree details)
  - SSH (remote workspace details)
  - Forking
  - Init Hooks

This provides better organization and makes it easier to find
workspace-type-specific information.

Move 'Reviewing Code' and 'Reviewing Functionality' sections from
local.md to workspaces.md since they apply to both local and SSH
workspaces.

Changes:
- Add reviewing sections to workspaces.md after 'Key Concepts'
- Remove reviewing sections from local.md (now focuses on worktree
  mechanics and filesystem layout)
- Add note in 'Reviewing Functionality' about detached HEAD being
  specific to local workspaces

This reduces duplication and puts shared concepts in the parent page
where they're easier to find.