feat: Implement rename functionality for directories and files

- Added `rename` method to `Directory` struct to rename files and
  directories, updating metadata and timestamps.  This improves
  file management capabilities.
- Added `rename` method to `OurDBVFS` to provide a unified
  interface for renaming files and directories across the VFS. This
  allows for consistent file system operations.
- Added tests for the new rename functionality in `vfsourdb_test.v`
  to ensure correctness and robustness. This enhances confidence in
  the implementation.

lib/vfs/ourdb_fs/directory.v

@@ -248,7 +248,30 @@ pub fn (mut dir Directory) move(src_name string, dst_name string) !FSEntry {
 		if mut entry := dir.myvfs.load_entry(child_id) {
 			if entry.metadata.name == src_name {
 				found = true
-				// Create a new directory entry with the new name
+				entry.metadata.name = dst_name
+				entry.metadata.modified_at = time.now().unix()
+				dir.myvfs.save_entry(entry)!
+				new_entry = entry
+				break
+			}
+		}
+	}
+
+	if !found {
+		return error('${src_name} not found')
+	}
+
+	return new_entry
+}
+
+pub fn (mut dir Directory) rename(src_name string, dst_name string) !FSEntry {
+	mut found := false
+	mut new_entry := FSEntry(dir)
+
+	for child_id in dir.children {
+		if mut entry := dir.myvfs.load_entry(child_id) {
+			if entry.metadata.name == src_name {
+				found = true
 				entry.metadata.name = dst_name
 				entry.metadata.modified_at = time.now().unix()
 				dir.myvfs.save_entry(entry)!

lib/vfs/vfsourdb/vfsourdb.v

@@ -127,8 +127,14 @@ pub fn (mut self OurDBVFS) get(path string) !vfscore.FSEntry {
 	return convert_to_vfscore_entry(entry)
 }
 
-pub fn (mut self OurDBVFS) rename(old_path string, new_path string) ! {
-	return error('Not implemented')
+pub fn (mut self OurDBVFS) rename(old_path string, new_path string) !vfscore.FSEntry {
+	src_parent_path := os.dir(old_path)
+	src_name := os.base(old_path)
+	dst_name := os.base(new_path)
+
+	mut src_parent_dir := self.get_directory(src_parent_path)!
+	renamed_dir := src_parent_dir.rename(src_name, dst_name)!
+	return convert_to_vfscore_entry(renamed_dir)
 }
 
 pub fn (mut self OurDBVFS) copy(src_path string, dst_path string) ! {

lib/vfs/vfsourdb/vfsourdb_test.v

@@ -56,31 +56,41 @@ fn test_vfsourdb() ! {
 	assert entries.len == 1
 	assert entries[0].get_metadata().name == 'test.txt'
 
+	// Test directory rename
+	renamed_dir := vfs.rename('/test_dir2', '/test_dir')!
+	assert moved_dir.get_metadata().name == 'test_dir2'
+	assert moved_dir.get_metadata().file_type == .directory
+
+	// Test directory listing
+	entries = vfs.dir_list('/test_dir')!
+	assert entries.len == 1
+	assert entries[0].get_metadata().name == 'test.txt'
+
 	// Test exists
-	assert vfs.exists('/test_dir2') == true
-	assert vfs.exists('/test_dir2/test.txt') == true
+	assert vfs.exists('/test_dir') == true
+	assert vfs.exists('/test_dir/test.txt') == true
 	assert vfs.exists('/nonexistent') == false
 
 	// Test symlink creation and reading
-	vfs.link_create('/test_dir2/test.txt', '/test_dir2/test_link')!
-	link_target := vfs.link_read('/test_dir2/test_link')!
-	assert link_target == '/test_dir2/test.txt'
+	vfs.link_create('/test_dir/test.txt', '/test_dir/test_link')!
+	link_target := vfs.link_read('/test_dir/test_link')!
+	assert link_target == '/test_dir/test.txt'
 
 	// Test symlink deletion
-	vfs.link_delete('/test_dir2/test_link')!
-	assert vfs.exists('/test_dir2/test_link') == false
+	vfs.link_delete('/test_dir/test_link')!
+	assert vfs.exists('/test_dir/test_link') == false
 
 	// Test file deletion
-	vfs.file_delete('/test_dir2/test.txt')!
-	assert vfs.exists('/test_dir2/test.txt') == false
-	assert vfs.exists('/test_dir2') == true
+	vfs.file_delete('/test_dir/test.txt')!
+	assert vfs.exists('/test_dir/test.txt') == false
+	assert vfs.exists('/test_dir') == true
 
-	entries = vfs.dir_list('/test_dir2')!
+	entries = vfs.dir_list('/test_dir')!
 	assert entries.len == 0
 
 	// Test directory deletion
-	vfs.dir_delete('/test_dir2')!
-	assert vfs.exists('/test_dir2') == false
+	vfs.dir_delete('/test_dir')!
+	assert vfs.exists('/test_dir') == false
 
 	println('Test completed successfully!')
 }