feat: change keyboard shortcut to cmd+y for all platforms

- Changed shortcut from cmd+' (mac) / ctrl+' (win/linux) to cmd+y for all platforms
- Provides consistent keybinding across all operating systems

Author: daniel-lxs

src/package.json

@@ -305,10 +305,10 @@
 		"keybindings": [
 			{
 				"command": "roo-cline.addToContext",
-				"key": "cmd+'",
-				"mac": "cmd+'",
-				"win": "ctrl+'",
-				"linux": "ctrl+'",
+				"key": "cmd+y",
+				"mac": "cmd+y",
+				"win": "cmd+y",
+				"linux": "cmd+y",
 				"when": "editorTextFocus && editorHasSelection"
 			}
 		],