feat: fine-grained peek and watch

[sxyazi]

No description provided.

[Copilot]

Pull Request Overview

This PR introduces fine-grained behavior for the new peek and watch commands across multiple modules. Key changes include:

• Adding a new watch command in both the proxy and manager layers.
• Replacing several direct hover/peek calls with the new watch calls.
• Removing deprecated padding methods and element registrations.

Reviewed Changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
yazi-proxy/src/mgr.rs	Added a new watch function to emit a watch command.
yazi-plugin/src/elements/rect.rs	Removed the deprecated padding method.
yazi-plugin/src/elements/elements.rs	Removed the deprecated "Padding" registration in element composition.
yazi-fm/src/executor.rs	Introduced watch event handling via on!(MGR, watch).
yazi-fm/src/app/commands/resize.rs	Added a call to peek(false) after hover.
yazi-core/src/tab/commands/sort.rs	Added peek(false) after calling hover for sort commands.
yazi-core/src/tab/commands/reveal.rs	Added peek(false) after hover; left a TODO comment for further review.
yazi-core/src/tab/commands/hidden.rs	Added peek(false) when hovered values change.
yazi-core/src/tab/commands/filter_do.rs	Added peek(false) after adjusting hover behavior in filtering.
yazi-core/src/tab/commands/arrow.rs	Added peek(false) after clearing hover in arrow commands.
yazi-core/src/mgr/commands/watch.rs	Introduced the new watch command implementation using a watcher.
yazi-core/src/mgr/commands/update_paged.rs	Updated opt conversion syntax and added a guard for empty targets.
yazi-core/src/mgr/commands/update_files.rs	Captured file revision to conditionally call hover, peek, and update_paged.
yazi-core/src/mgr/commands/refresh.rs	Replaced hover with watch(()) and added peek(false) in the refresh flow.
yazi-core/src/mgr/commands/mod.rs	Registered the new watch command.
yazi-core/src/mgr/commands/hover.rs	Replaced an inline peek call with a call to watch(()).