feat: adds support for gpt-4-vison

[tbckr]

This PR adds support for the gpt-4-vision model enabling the user to ask questions about provided images.

Note: we will wait until the openai library has released a stable version for access to the model - right now the master version is used.

[codecov]

Codecov Report

Attention: 30 lines in your changes are missing coverage. Please review.

Comparison is base (5d1c773) 75.59% compared to head (caa0bbc) 75.66%.
Report is 4 commits behind head on main.

Files	Patch %	Lines
pkg/api/api.go	83.33%	15 Missing and 6 partials ⚠️
pkg/fs/fs.go	66.66%	6 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #184      +/-   ##
==========================================
+ Coverage   75.59%   75.66%   +0.06%     
==========================================
  Files          19       19              
  Lines        1176     1278     +102     
==========================================
+ Hits          889      967      +78     
- Misses        207      223      +16     
- Partials       80       88       +8     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.