feat: Add conversion and deletion confirmation screens, enhance media panel properties

- Implemented ConvertConfirmScreen for confirming AVI to MKV conversions with audio and subtitle options.
- Added DeleteConfirmScreen for confirming file deletions with detailed file information.
- Enhanced MediaPanelView to include additional MediaInfo properties such as video, audio, and subtitle tracks.
- Updated MediaPanelProperties to extract and display raw MediaInfo track data.
- Introduced HelpScreen for user guidance on application features and navigation.
- Created OpenScreen for directory path input with validation.
- Developed RenameConfirmScreen for renaming files with user confirmation and editing capabilities.
- Added SettingsScreen for configuring application settings, including cache TTL and HEVC encoding options.
- Updated imports and module exports in views to accommodate new screens.

renamer/views/open_screen.py

@@ -0,0 +1,30 @@
+from textual.screen import Screen
+from textual.widgets import Input, Button
+from pathlib import Path
+
+
+class OpenScreen(Screen):
+    def compose(self):
+        yield Input(placeholder="Enter directory path", value=".", id="dir_input")
+        yield Button("OK", id="ok")
+
+    def on_button_pressed(self, event):
+        if event.button.id == "ok":
+            self.submit_path()
+
+    def on_input_submitted(self, event):
+        self.submit_path()
+
+    def submit_path(self):
+        path_str = self.query_one("#dir_input", Input).value
+        path = Path(path_str)
+        if not path.exists():
+            # Show error
+            self.query_one("#dir_input", Input).value = f"Path does not exist: {path_str}"
+            return
+        if not path.is_dir():
+            self.query_one("#dir_input", Input).value = f"Not a directory: {path_str}"
+            return
+        self.app.scan_dir = path # type: ignore
+        self.app.scan_files() # type: ignore
+        self.app.pop_screen()