Add a filter for genres

[brittanyrw]

Each movie, TV show and musical includes a list of genres. Create a dropdown that allows users to filter the displayed cards by genre.

• Only use JavaScript, no JavaScript frameworks.
• Use an HTML select element for the dropdown.
• The styling should match the current design of the website.
• The dropdown should meet accessibility requirements.
• The names of each genre should be consistent in the dropdown and should show up with the first letter capitalized (for example "Drama", "Sci-Fi", "Comedy", etc).

[maztt]

Hey @brittanyrw, I will try working on it within the next days. Could you assign me to this?