Add latest AI models

[eamodio]

Add support for the following AI models:

• OpenAI o1 & 03-mini
• Gemini 2.0 Flash, 2.0 Flash-Lite, 2.0 Pro, and 2.0 Flash Thinking

[eamodio]

To verify:

Validate that explain changes or generate commit message works with these new models.

[d13]

Resolved with 11dd873

[d13]

✅ Verified OpenAI models

[d13]

Verified Gemini Models:

• ✅ 2.0 Flash
• ✅ 2.0 Flash-Lite
• ✅ 2.0 Pro
• ✅ 2.0 Flash Thinking