feat: add rename functionality to file editor

Add ability to rename files and folders through the context menu:
- Add rename_path Tauri command in backend
- Add renamePath function to editor store that updates open tabs
- Add rename option to context menu with pencil icon
- Update InputDialog to support initial value for rename operations

src/lib/components/editor/FileContextMenu.svelte

@@ -8,12 +8,22 @@
     currentDirectory: string;
     onNewFile: (parentPath: string) => void;
     onNewFolder: (parentPath: string) => void;
+    onRename: (entry: FileEntry) => void;
     onDelete: (entry: FileEntry) => void;
     onClose: () => void;
   }
 
-  let { x, y, targetEntry, currentDirectory, onNewFile, onNewFolder, onDelete, onClose }: Props =
-    $props();
+  let {
+    x,
+    y,
+    targetEntry,
+    currentDirectory,
+    onNewFile,
+    onNewFolder,
+    onRename,
+    onDelete,
+    onClose,
+  }: Props = $props();
 
   function handleNewFile() {
     const parentPath = targetEntry?.isDirectory ? targetEntry.path : currentDirectory;
@@ -27,6 +37,13 @@
     onClose();
   }
 
+  function handleRename() {
+    if (targetEntry) {
+      onRename(targetEntry);
+      onClose();
+    }
+  }
+
   function handleDelete() {
     if (targetEntry) {
       onDelete(targetEntry);
@@ -91,6 +108,21 @@
     {#if targetEntry}
       <div class="my-1 border-t border-gray-700"></div>
 
+      <button
+        class="flex w-full items-center gap-2 px-3 py-1.5 text-left text-sm text-gray-200 hover:bg-gray-700"
+        onclick={handleRename}
+      >
+        <svg class="h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+          <path
+            stroke-linecap="round"
+            stroke-linejoin="round"
+            stroke-width="2"
+            d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z"
+          />
+        </svg>
+        Rename
+      </button>
+
       <button
         class="flex w-full items-center gap-2 px-3 py-1.5 text-left text-sm text-red-400 hover:bg-gray-700"
         onclick={handleDelete}