DEV: Add disableDefaultKeyboardShortcuts plugin API to disable default keyboard shortcuts (#29401)

# Context

Add `disableDefaultKeyboardShortcuts` function to the plugin API to allow for disabling [default bindings](e4941278b2/app/assets/javascripts/discourse/app/lib/keyboard-shortcuts.js (L49)). 

# Details
This function is used to disable a "default" keyboard shortcut. You can pass an array of shortcut bindings as strings to disable them.

**Please note that this function must be called from a pre-initializer.**

Example:
```js
api.disableDefaultKeyboardShortcuts(['command+f', 'shift+c']);
```

- Added system spec, displaying intended behavior

docs/CHANGELOG-JAVASCRIPT-PLUGIN-API.md

@@ -7,6 +7,11 @@ in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.37.3] - 2024-10-24
+
+- Added `disableDefaultKeyboardShortcuts` which allows plugins/TCs to disable default keyboard shortcuts.
+
+
 ## [1.37.2] - 2024-10-02
 
 - Fixed comments and text references to Font Awesome 5 in favor of the more generic Font Awesome due to core now having the latest version and no longer needing to specify version 5.