style: Apply Prettier formatting with 4-space indentation

Applied consistent code formatting across the project using Prettier, now configured to use 4-space indentation instead of tabs.

.prettierrc

@@ -1,9 +1,9 @@
 {
-	"useTabs": false,
-	"tabWidth": 4,
-	"singleQuote": true,
-	"trailingComma": "none",
-	"printWidth": 100,
-	"plugins": ["prettier-plugin-svelte"],
-	"overrides": [{ "files": "*.svelte", "options": { "parser": "svelte" } }]
+    "useTabs": false,
+    "tabWidth": 4,
+    "singleQuote": true,
+    "trailingComma": "none",
+    "printWidth": 100,
+    "plugins": ["prettier-plugin-svelte"],
+    "overrides": [{ "files": "*.svelte", "options": { "parser": "svelte" } }]
 }