[FEATURE]: Gemini 2.5 flash and pro support

[pragmaticivan]

Problem Statement

Just need to add support to the latest gemini models.

Proposed Solution

Add pro and flash as options in the constant

vision-parse/src/vision_parse/constants.py

Line 12 in b862daf

"gemini-2.0-flash-exp": "gemini",

Alternatives Considered

No response

Final Checklist

• This feature would be useful to other users
• I'm willing to help implement this feature