feat: add firearm management features

- Implemented API for fetching firearms and firearm details.
- Created a new page for displaying the list of firearms with search and filter options.
- Added Redux slice for managing firearms state.
- Integrated Redux Persist for state persistence.
- Updated routing to include firearms page.
- Removed obsolete modification codes data.
- Enhanced UI with responsive grid layout for firearms display.
- Added utility functions for handling URL query parameters.

src/index.css

@@ -8,4 +8,27 @@ html, body {
 
 #root {
   width: 100%;
+}
+
+.mod-codes-grid {
+  display: grid;
+  grid-template-columns: repeat(1, minmax(0, 1fr));
+}
+
+@media (min-width: 640px) {
+  .mod-codes-grid {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
+}
+
+@media (min-width: 1024px) {
+  .mod-codes-grid {
+    grid-template-columns: repeat(3, minmax(0, 1fr));
+  }
+}
+
+@media (min-width: 1280px) {
+  .mod-codes-grid {
+    grid-template-columns: repeat(4, minmax(0, 1fr));
+  }
 }