Allow filltering based on language

[shawnCaza]

Show languages are identified during the episode summary generation process. At present there are at least 6 French shows, and 11 Spanish, and 259 English shows identified, 70 shows that do not yet have a language associated with it, and few others where language designation may not be accurate or important(music only shows).

With a growing number of French/Spanish shows, it could be nice to allow users to filter results by language preference in the UI. To do this we'd need to:

• Return the lang column from the shows table in get_all_shows
• Create filtering components for the UI
• Determine how to best track state of lang preference(likely a Zustand store since it's already in use), and store the filtered version of the useShowsQuery.
• Ensure all components that make use of the data from the useShowsQuery are using the filtered version when appropriate.