Add api docs for rhai config

[Pajn]

Summary by CodeRabbit

• New Features

  • CLI to (re)generate the Config API docs and CI check to enforce docs are up-to-date.
  • Server workspace persistence: workspaces saved on shutdown and restored on restart.

• Documentation

  • Full, auto-generated Config API reference published as markdown + searchable themed HTML with examples and Rhai highlighting.

• Behavior Changes

  • Some legacy resize-related script helpers and bindings removed; floating-buffer move now preserves close-on-empty semantics.

• Tests

  • Added tests for docs freshness and workspace persistence.

Stack

• impl Initial implementation #1 (merged)
• → api-docs Add api docs for rhai config #2
• persistance Persist workspace state across clean restarts #3 (merged)
• buffer-cli Add native detached buffer CLI workflows #9
• session-rename Add native session rename support #5
• client-switch Add native client list detach and switch workflows #6
• pty-alive Keep PTY runtimes alive across server restarts #7
• cli-tree Add buffer and node cli actions #8