feat(vscode): customize activity bar and peacock colors

- Add custom colors for the activity bar to enhance UI aesthetics
- Set Peacock extension color for consistent workspace theming

.vscode/settings.json

@@ -18,4 +18,13 @@
     ],
     "exportall.config.barrelName": "mod.ts",
     "exportall.config.message": "deno-coverage-ignore-file",
+    "workbench.colorCustomizations": {
+        "activityBar.activeBackground": "#9ed8bc",
+        "activityBar.background": "#9ed8bc",
+        "activityBar.foreground": "#15202b",
+        "activityBar.inactiveForeground": "#15202b99",
+        "activityBarBadge.background": "#a177c8",
+        "activityBarBadge.foreground": "#15202b"
+    },
+    "peacock.color": "#7ac9a3",
 }