feat(blocks): Add Ideogram V3 model

[Bentlybro]

Adds support for Ideogram V3 model while maintaining backward compatibility with existing models (V1,
V1_TURBO, V2, V2_TURBO). Updates default model to V3 and implements smart API routing to handle
Ideogram's new V3 endpoint requirements.

Changes Made

• Added V3 model support: Added V_3 to IdeogramModelName enum and set as default
• Dual API endpoint handling:
  • V3 models route to new /v1/ideogram-v3/generate endpoint with updated payload format
  • Legacy models (V1, V2, Turbo variants) continue using /generate endpoint
• Model-specific feature filtering:
  • V1 models: Basic parameters only (no style_type or color_palette support)
  • V2/V2_TURBO: Full legacy feature support including style_type and color_palette
  • V3: New endpoint with aspect ratio mapping and updated parameter structure
• Aspect ratio compatibility: Added mapping between internal enum values and V3's expected format
  (ASPECT_1_1 → 1x1)
• Updated pricing: V3 model costs 18 credits (vs 16 for other models)
• Updated default usage: Store image generation now uses V3 by default

Technical Details

Ideogram updated their API with a separate V3 endpoint that has different requirements:

• Different URL path (/v1/ideogram-v3/generate)
• Different aspect ratio format (e.g., 1x1 instead of ASPECT_1_1)
• Model-specific feature support (V1 models don't support style_type, etc.)

The implementation intelligently routes requests to the appropriate endpoint based on the selected model
while maintaining a single unified interface.

I tested all the models and they are working here

Checklist 📋

For code changes:

• I have clearly listed my changes in the PR description
• I have made a test plan
• I have tested my changes according to the test plan:
  • Test the Ideogram model block and watch as they all work!

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[deepsource-io]

Here's the code health analysis summary for commits 533d2d0..3b3b65a. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
JavaScript	✅ Success		View Check ↗
Python	✅ Success	❗ 2 occurences introduced 🎯 1 occurence resolved	View Check ↗

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