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/help_screen.py

@@ -0,0 +1,68 @@
+from textual.screen import Screen
+from textual.widgets import Static, Button
+from textual.containers import Vertical
+
+
+class HelpScreen(Screen):
+    def compose(self):
+        try:
+            from importlib.metadata import version
+            app_version = version("renamer")
+        except Exception:
+            app_version = "unknown"
+
+        help_text = f"""
+Media File Renamer v{app_version}
+
+A powerful tool for analyzing and renaming media files with intelligent metadata extraction.
+
+NAVIGATION:
+• Use arrow keys to navigate the file tree
+• Right arrow: Expand directory
+• Left arrow: Collapse directory
+• Enter/Space: Select file
+
+ACTIONS:
+• o: Open directory - Change the scan directory
+• s: Scan - Refresh the current directory
+• f: Refresh - Reload metadata for selected file
+• r: Rename - Rename selected file with proposed name
+• c: Convert - Convert AVI file to MKV container with metadata
+• d: Delete - Delete selected file (with confirmation)
+• p: Expand/Collapse - Toggle expansion of selected directory
+• m: Toggle Mode - Switch between technical and catalog display modes
+• ctrl+s: Settings - Open settings window
+• ctrl+p: Command Palette - Access cache commands and more
+• h: Help - Show this help screen
+• q: Quit - Exit the application
+
+FEATURES:
+• Automatic metadata extraction from filenames
+• MediaInfo integration for technical details
+• Intelligent title, year, and format detection
+• Support for special editions and collections
+• Real-time file analysis and renaming suggestions
+
+FILE ANALYSIS:
+The app extracts various metadata including:
+• Movie/series titles and years
+• Video resolution and frame rates
+• Audio languages and formats
+• Special edition information
+• Collection order numbers
+• HDR and source information
+
+Press any key to close this help screen.
+        """.strip()
+
+        with Vertical():
+            yield Static(help_text, id="help_content")
+            yield Button("Close", id="close")
+
+    def on_button_pressed(self, event):
+        if event.button.id == "close":
+            self.app.pop_screen()
+
+    def on_key(self, event):
+        # Close on any key press
+        self.app.pop_screen()