refactor: remove obsolete configuration file, update flake.lock, and modify package list

vscode/settings.json

@@ -4,10 +4,7 @@
   "editor.fontFamily": "Hack Nerd Font",
   "terminal.integrated.fontFamily": "Hack Nerd Font",
   "github.copilot.enable": {
-    "*": true,
-    "plaintext": true,
-    "markdown": true,
-    "scminput": false
+    "*": true
   },
   "git.autofetch": true,
   "workbench.iconTheme": "vscode-icons",
@@ -64,5 +61,6 @@
   },
   "go.toolsManagement.autoUpdate": true,
   "redhat.telemetry.enabled": false,
-  "makefile.configureOnOpen": false
+  "makefile.configureOnOpen": false,
+  "workbench.colorTheme": "Default Light+"
 }