feat: delete conversations

[FrenchGithubUser]

users should be able to delete their conversations. checkboxes to batch delete. the deletion should be a soft delete in the db, and only one-sided (the deletion should only happen for one user, not both unless they both delete it).

[HirenGajjar]

Hi @FrenchGithubUser , I would like to work on it!

[FrenchGithubUser]

yes go ahead! I assigned you to the issue