Feat: Add gemini AI Pro vision model in '/gemini-vision'

[Subhadeep3902]

• UI should be like the below

• Add markdown render Also check #1 and #2

[kom-senapati]

I can do the ui part!

[AdarshGT33]

is the functionality implemented?

[kom-senapati]

No I will add a pr for UI, you can do the functionality of uploading a file + chatting with ai

[kom-senapati]

The file modal ui is also done. #14