Some cleanup

- Use whateverEmitter.event for the onWhatever methods.
- Add readonly to a bunch of things.
- Remove some redundancy in types.
- Move initializations out of the constructor and into the declarations
  where it was reasonable to do so.
- Disable a few no-any violations.

packages/ide/src/fill/clipboard.ts

@@ -1,11 +1,11 @@
-import { IDisposable } from "@coder/disposable";
 import { Emitter } from "@coder/events";
 
 /**
  * Wrapper around the native clipboard with some fallbacks.
  */
 export class Clipboard {
-	private readonly enableEmitter: Emitter<boolean> = new Emitter();
+	private readonly enableEmitter = new Emitter<boolean>();
+	public readonly onPermissionChange = this.enableEmitter.event;
 	private _isEnabled: boolean = false;
 
 	/**
@@ -70,14 +70,6 @@ export class Clipboard {
 		// tslint:enable no-any
 	}
 
-	/**
-	 * Register a function to be called when the native clipboard is
-	 * enabled/disabled.
-	 */
-	public onPermissionChange(cb: (enabled: boolean) => void): IDisposable {
-		return this.enableEmitter.event(cb);
-	}
-
 	/**
 	 * Read text from the clipboard.
 	 */