feat: add configurable timeout settings for Ollama embedder

[roomote]

This PR implements configurable timeout settings for the Ollama embedder to resolve issue #5733.

Changes Made

Core Implementation

• Ollama Embedder Timeout Configuration: Added configurable timeout parameters for embedding operations (default: 30s) and validation operations (default: 10s)
• Configuration Interface Updates: Extended type definitions and configuration schemas to support timeout settings
• Webview Message Handling: Updated message handlers to process and persist timeout settings in VSCode global state

User Interface

• Settings UI Components: Added timeout configuration fields in the CodeIndexPopover with proper validation and user-friendly tooltips
• Input Validation: Implemented range validation (1-300s for embedding, 1-60s for validation) with helpful error messages
• Internationalization: Added translation keys for all timeout-related UI text

Technical Details

• Type Safety: All timeout configurations are properly typed with Zod schemas and TypeScript interfaces
• Backward Compatibility: Existing configurations continue to work with sensible defaults
• Configuration Pipeline: Timeout settings integrate seamlessly with existing configuration management
• Test Coverage: Added comprehensive test coverage for timeout functionality

Problem Solved

Previously, the Ollama embedder used hardcoded 10-second timeouts for embedding requests, which was too aggressive for large codebases. Users reported indexing failures partway through large repositories due to connection timeouts.

This implementation allows users to configure appropriate timeout values based on their:

• Hardware capabilities
• Network conditions
• Codebase size
• Ollama model performance

Default Values

• Embedding Timeout: 30 seconds (3x the previous hardcoded value)
• Validation Timeout: 10 seconds (maintains existing validation timeout)

These defaults provide a good balance between responsiveness and reliability for most use cases, while allowing customization for specific needs.

Fixes #5733

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Important

This PR adds configurable timeout settings for the Ollama embedder, including UI updates, configuration management, and test coverage.

• Behavior:
  • Adds configurable timeout settings for Ollama embedder in codebase-index.ts and webviewMessageHandler.ts.
  • Default timeouts: 30s for embedding, 10s for validation.
  • Updates CodeIndexOllamaEmbedder in ollama.ts to use new timeout settings.
• Configuration:
  • Extends CodebaseIndexConfig and OllamaConfigOptions in config.ts to include timeout settings.
  • Updates CodeIndexConfigManager in config-manager.ts to load and manage new settings.
• UI and Validation:
  • Adds timeout configuration fields in CodeIndexPopover.tsx with validation and tooltips.
  • Updates settings.json for internationalization of timeout-related text.
• Testing:
  • Adds test for timeout parameters in service-factory.spec.ts to ensure they are passed correctly to the embedder.

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