feat(gui): add toolbar widget

.clangd

@@ -0,0 +1,30 @@
+CompileFlags:
+  CompilationDatabase: .
+
+Diagnostics:
+  UnusedIncludes: None
+  MissingIncludes: None
+  ClangTidy:
+    Add:
+      - bugprone-sizeof-expression
+      - bugprone-suspicious-memset-usage
+      - bugprone-integer-division
+      - bugprone-macro-parentheses
+      - bugprone-bool-pointer-implicit-conversion
+      - bugprone-multiple-statement-macro
+      - performance-type-promotion-in-math-fn
+    Remove:
+      - bugprone-easily-swappable-parameters
+
+InlayHints:
+  Enabled: Yes
+  ParameterNames: Yes
+  DeducedTypes: Yes
+  Designators: Yes
+  BlockEnd: No
+
+Hover:
+  ShowAKA: Yes
+
+Completion:
+  AllScopes: Yes