Do not just pick first from search.filters, consider all options, filtering based on git-root and workspaces config

Fix: #2700
Might Fix: #2536

Wrote a few simple unit tests, and tried it by running the client locally. Not sure about which of "[search] filters" vs "workspaces" should be more respected, so i made it so if workspaces = false, regardless of whats in "[search] filters" workspace gets filtered out.

First time looking at atuins code, let me know if this needs any changes.

edit: (from my post here: #2536 (comment))

workspaces = true
[search]
filters = [ "workspace", "directory", "session", "global" ]

Checks

• I am happy for maintainers to push small adjustments to this PR, to speed up the review cycle
• I have checked that there are no existing pull requests for the same thing
  • Add "filter_mode_list" configuration option #1655 might be related, but it seems to also implement code that is already merged, and has been open for over a year, hope its ok to suggest this