docs(index): Highlight snapshot_pane, paste_text, and navigation on the landing page

why: The "What you can do" teaser on the docs landing page listed
only the pre-PR tool subset, missing the headline capabilities added
in PR #11. Readers arriving at the landing page couldn't see at a
glance that the server now covers rich one-shot snapshots, bracketed
paste, content-change waits, pane/window navigation, and output
logging.

what:
- Inspect: add `snapshot-pane` (rich capture), `wait-for-content-change`
  (generic change detection), and `display-message` (arbitrary tmux
  format queries).
- Act: add `paste-text` (multi-line paste), `select-pane` /
  `select-window` (navigation), `move-window` (rearrange), and
  `pipe-pane` (output logging).
- Keep the teaser selective — swap_pane, enter_copy_mode, and
  exit_copy_mode remain discoverable via "Browse all tools →".

Author: tony

docs/index.md

@@ -53,13 +53,13 @@ Config blocks for Claude Desktop, Claude Code, Cursor, and others.
 
 Read tmux state without changing anything.
 
-{toolref}`list-sessions` · {toolref}`capture-pane` · {toolref}`get-pane-info` · {toolref}`search-panes` · {toolref}`wait-for-text`
+{toolref}`list-sessions` · {toolref}`capture-pane` · {toolref}`snapshot-pane` · {toolref}`get-pane-info` · {toolref}`search-panes` · {toolref}`wait-for-text` · {toolref}`wait-for-content-change` · {toolref}`display-message`
 
 ### Act (mutating)
 
 Create or modify tmux objects.
 
-{toolref}`create-session` · {toolref}`send-keys` · {toolref}`create-window` · {toolref}`split-window` · {toolref}`resize-pane` · {toolref}`set-option`
+{toolref}`create-session` · {toolref}`send-keys` · {toolref}`paste-text` · {toolref}`create-window` · {toolref}`split-window` · {toolref}`select-pane` · {toolref}`select-window` · {toolref}`move-window` · {toolref}`resize-pane` · {toolref}`pipe-pane` · {toolref}`set-option`
 
 ### Destroy (destructive)