Add List panel (session 9, fifteenth feature)

Renders a naming-scheme-style expression per loaded file via the same
render_expression engine the Rename panel's live preview uses, fed by
the same local guess_episode/guess_movie/guess_release_info matching
Filter already uses. Copy List and Export to File... (a new
export_text_list Tauri command - the only new backend surface this
feature needed) round it out. Closes out all six original sidebar
panels as real screens.

src-tauri/src/lib.rs

@@ -2,6 +2,7 @@ mod cli;
 mod episodes;
 mod files;
 mod history;
+mod list;
 mod metadata;
 mod presets;
 mod settings;
@@ -121,6 +122,7 @@ pub fn run() {
             sfv::compute_checksums,
             sfv::save_checksum_file,
             sfv::verify_checksum_file,
+            list::export_text_list,
             history::list_rename_history,
             history::undo_rename_batch,
             presets::list_presets,