feat(tool): add vscode extension recommendations

Signed-off-by: Nikolas Rimikis <leptopoda@users.noreply.github.com>

.vscode/extensions.json

@@ -0,0 +1,9 @@
+{
+    "recommendations": [
+        "dart-code.dart-code",
+        "dart-code.flutter",
+        "jebbs.plantuml",
+        "redhat.vscode-yaml",
+        "streetsidesoftware.code-spell-checker"
+    ]
+}

.vscode/settings.json

@@ -2,12 +2,14 @@
   "dart.lineLength": 120,
   "yaml.format.singleQuote": true,
   "dart.flutterSdkPath": ".fvm/flutter_sdk",
-  // Remove .fvm files from search
+  "files.insertFinalNewline": true,
   "search.exclude": {
     "**/.fvm": true
   },
-  // Remove from file watching
   "files.watcherExclude": {
     "**/.fvm": true
+  },
+  "files.associations": {
+    "*.arb": "json",
   }
-}
+}