chore(vscode): customize activity bar and theme settings

- Add custom color settings for the activity bar and badges
- Include a peacock theme color for workspace customization

.vscode/settings.json

@@ -2,5 +2,14 @@
     "python.envFile": "${workspaceFolder}/.env",
     "python.analysis.extraPaths": [
         "src"
-    ]
+    ],
+    "workbench.colorCustomizations": {
+        "activityBar.activeBackground": "#a9e3ea",
+        "activityBar.background": "#a9e3ea",
+        "activityBar.foreground": "#15202b",
+        "activityBar.inactiveForeground": "#15202b99",
+        "activityBarBadge.background": "#d965cd",
+        "activityBarBadge.foreground": "#15202b"
+    },
+    "peacock.color": "#80d5e0"
 }