editor: Add Organize Imports Action (#25793)

Closes #10004

This PR adds support for the organize imports action. Previously, you
had to manually configure it in the settings and then use format to run
it.

Note: Default key binding will be `alt-shift-o` which is similar to
VSCode's organize import. Also, because `cmd-shift-o` is taken by
outline picker.

Todo:

- [x] Initial working
- [x] Handle remote
- [x] Handle multi buffer
- [x] Can we make it generic for executing any code action?

Release Notes:

- Added `editor:OrganizeImports` action to organize imports (sort,
remove unused, etc) for supported LSPs. You can trigger it by using the
`alt-shift-o` key binding.

assets/keymaps/default-macos.json

@@ -118,6 +118,7 @@
       "cmd-a": "editor::SelectAll",
       "cmd-l": "editor::SelectLine",
       "cmd-shift-i": "editor::Format",
+      "alt-shift-o": "editor::OrganizeImports",
       "cmd-shift-left": ["editor::SelectToBeginningOfLine", { "stop_at_soft_wraps": true, "stop_at_indent": true }],
       "shift-home": ["editor::SelectToBeginningOfLine", { "stop_at_soft_wraps": true, "stop_at_indent": true }],
       "ctrl-shift-a": ["editor::SelectToBeginningOfLine", { "stop_at_soft_wraps": true, "stop_at_indent": true }],