[Extension API] Custom commands and keybindings (#1075)

* Add keybinding schema

* nit

* Keybinding store

* nit

* wip

* Bind condition on ComfyCommand

* Add settings

* nit

* Revamp keybinding store

* Add tests

* Add load keybinding

* load extension keybindings

* Load extension commands

* Handle keybindings

* test

* Keybinding playwright test

* Update README

* nit

* Remove log

* Remove system stats fromt logging.ts

README.md

@@ -145,6 +145,35 @@ https://github.com/user-attachments/assets/c142c43f-2fe9-4030-8196-b3bfd4c6977d
 
 ### Node developers API
 
+<details>
+  <summary>v1.3.7: Register commands and keybindings</summary>
+
+  Extensions can call the following API to register commands and keybindings. Do
+  note that keybindings defined in core cannot be overwritten, and some keybindings
+  are reserved by the browser.
+
+```js
+  app.registerExtension({
+    name: 'TestExtension1',
+    commands: [
+      {
+        id: 'TestCommand',
+        function: () => {
+          alert('TestCommand')
+        }
+      }
+    ],
+    keybindings: [
+      {
+        combo: { key: 'k' },
+        commandId: 'TestCommand'
+      }
+    ]
+  })
+```
+
+</details>
+
 <details>
   <summary>v1.3.1: Extension API to register custom topbar menu items</summary>