feat: add LanceDB vector store with upsert, delete, and search

sample-data/Default/Side Project/English Style Converter/00-english-style-converter-concept.md

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+---
+category: ai
+date_added: 2026-04-12
+due_date: 
+---
+
+# Project Idea: [[Concept/English Style Converter]]
+
+**Concept:** A system that takes a normal [[Concept/English]] sentence and converts it into various different [[Concept/English]] styles and tones.
+
+**Potential Features:**
+- **Style Options:** Sarcasm, Formal, Casual, Academic, Poetic, etc.
+- **Input:** User provides a standard sentence.
+- **Output:** The sentence rewritten in the selected style(s).
+- **Customization:** Ability to toggle levels of formality or intensity of sarcasm.
+
+**Source:** User prompt via image/text on 2026-04-12.