Sketch in a table for the keybindings UI (#32436)

Adds the initial semblance of a keymap UI. It is currently gated behind the `settings-ui` feature flag. Follow up PRs will add polish and missing features.

Release Notes:

- N/A

---------

Co-authored-by: Ben Kunkle <ben@zed.dev>
Co-authored-by: Anthony <anthony@zed.dev>

Cargo.lock

@@ -14569,13 +14569,22 @@ dependencies = [
 name = "settings_ui"
 version = "0.1.0"
 dependencies = [
+ "collections",
+ "command_palette",
  "command_palette_hooks",
+ "component",
+ "db",
  "editor",
  "feature_flags",
  "fs",
+ "fuzzy",
  "gpui",
  "log",
+ "menu",
+ "paths",
+ "project",
  "schemars",
+ "search",
  "serde",
  "settings",
  "theme",