docs: sync category names with code and add missing schema fields

- Update category tables to match DEFAULT_CATEGORIES in constants.ts
- Remove non-existent 'most-capable' and 'general' categories
- Add 'unspecified-low' and 'unspecified-high' categories
- Update model names to full paths (e.g., openai/gpt-5.2-codex)
- Add new CategoryConfig schema fields: description, variant, top_p, etc.
- Fix atlas.ts prompt examples with correct category names

src/agents/atlas.ts

@@ -791,12 +791,12 @@ Before processing sequentially, check if there are PARALLELIZABLE tasks:
 {{CATEGORY_SKILLS_DELEGATION_GUIDE}}
 
 **Examples:**
-- "Category: general. Standard implementation task, no special expertise needed."
-- "Category: visual. Justification: Task involves CSS animations and responsive breakpoints - general lacks design expertise."
-- "Category: strategic. [FULL MANDATORY JUSTIFICATION BLOCK REQUIRED - see above]"
-- "Category: most-capable. Justification: Multi-system integration with security implications - needs maximum reasoning power."
+- "Category: quick. Standard implementation task, trivial changes."
+- "Category: visual-engineering. Justification: Task involves CSS animations and responsive breakpoints - quick lacks design expertise."
+- "Category: ultrabrain. [FULL MANDATORY JUSTIFICATION BLOCK REQUIRED - see above]"
+- "Category: unspecified-high. Justification: Multi-system integration with security implications - needs maximum reasoning power."
 
-**Keep it brief for non-strategic. For strategic, the justification IS the work.**
+**Keep it brief for non-ultrabrain. For ultrabrain, the justification IS the work.**
 
 #### 3.3: Prepare Execution Directive (DETAILED PROMPT IS EVERYTHING)