Remove the cancellation of remaining goroutines when a vendor collection fails.
This ensures that other vendor collections continue even if one fails.
Fixes listing models via `fabric -L` and using non-default models via `fabric -m custom_model`,
when localhost models (e.g. Ollama, LM Studio) are not listening on a given port (basically shut down).
## CHANGES
- Updated anthropic-sdk-go from v0.2.0-alpha.4 to v0.2.0-alpha.11
- Added Claude 3.7 Sonnet models to available model list
- Added ModelClaude3_7SonnetLatest to model options
- Added ModelClaude3_7Sonnet20250219 to model options
- Removed ModelClaude_Instant_1_2 from available models
- Added LM Studio as a new plugin, now it can be used with Fabric.
- Updated the plugin registry with the new plugin name
- Updated the configuration with the required base url
- Enable and improve custom API base URL configuration
- Add proper handling of v1 endpoint for UUID-containing URLs
- Implement URL formatting logic for consistent endpoint structure
- Clean up commented code and improve configuration flow
