feat(ollama-wordsmith): add Ollama Wordsmith extension

[AdityaZxxx]

Summary

Adds Ollama WordSmith, a local-first text processing extension for Vicinae powered by Ollama.

Supports:

• Translate
• Summarize
• Explain
• Enhance (8 writing styles)
• Dictionary lookup

All processing runs locally through Ollama with no external APIs.

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Features

• 59 languages
• Streaming responses
• Per-mode model selection
• In-app Ollama model browser (/api/tags)
• History with delete support
• URL/code masking before inference
• Output cleanup for stray LLM meta text

Dictionary mode

• IPA pronunciation
• Definitions grouped by part of speech
• Usage examples
• Optional etymology
• Confidence gating

Enhance mode

Styles:

• Professional
• Casual
• Humorous
• Academic
• Persuasive
• Concise
• Storytelling
• Inspiring

Shortcut: Ctrl+Shift+S

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Testing

Tested on Linux with translategemma:4b.

• npm run build
• TypeScript passes with zero errors
• Extension schema validates against extension.json

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Architecture

Input
  → preprocess (mask URLs/code)
  → prompt builder
  → Ollama
  → postprocess
  → display