feat: Import 35+ skills, merge duplicates, add openclaw installer

Major updates:
- Added 35+ new skills from awesome-opencode-skills and antigravity repos
- Merged SEO skills into seo-master
- Merged architecture skills into architecture
- Merged security skills into security-auditor and security-coder
- Merged testing skills into testing-master and testing-patterns
- Merged pentesting skills into pentesting
- Renamed website-creator to thai-frontend-dev
- Replaced skill-creator with github version
- Removed Chutes references (use MiniMax API instead)
- Added install-openclaw-skills.sh for cross-platform installation
- Updated .env.example with MiniMax API credentials

skills/minimax-docx/references/openxml_units.md

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+# OpenXML Unit Conversion Quick Reference
+
+## Master Conversion Table
+
+| Unit | 1 inch | 1 cm | 1 mm | 1 pt | Description |
+|------|--------|------|------|------|-------------|
+| DXA (twips) | 1440 | 567 | 56.7 | 20 | 1/20 of a point. Used for margins, indents, spacing, page size. |
+| EMU | 914400 | 360000 | 36000 | 12700 | English Metric Unit. Used for images, drawings, shapes. |
+| Half-points | 144 | 56.7 | 5.67 | 2 | Used for font sizes (`w:sz`, `w:szCs`). |
+| Points | 72 | 28.35 | 2.835 | 1 | Standard typographic unit. Not used directly in most attributes. |
+| Eighths of a point | 576 | 226.8 | 22.68 | 8 | Used for `w:spacing` character spacing. |
+
+## Common Page Sizes
+
+| Size | Width (DXA) | Height (DXA) | Width (mm) | Height (mm) |
+|------|-------------|--------------|------------|-------------|
+| A4 | 11906 | 16838 | 210 | 297 |
+| Letter | 12240 | 15840 | 215.9 | 279.4 |
+| Legal | 12240 | 20160 | 215.9 | 355.6 |
+| A3 | 16838 | 23811 | 297 | 420 |
+| A5 | 8391 | 11906 | 148 | 210 |
+
+## Common Margin Values
+
+| Margin | DXA | Inches | cm |
+|--------|-----|--------|----|
+| 0.5 inch | 720 | 0.5 | 1.27 |
+| 0.75 inch | 1080 | 0.75 | 1.91 |
+| 1 inch | 1440 | 1.0 | 2.54 |
+| 1.25 inch | 1800 | 1.25 | 3.18 |
+| 1.5 inch | 2160 | 1.5 | 3.81 |
+
+## Font Size Values (`w:sz`)
+
+| Display Size | w:sz value | Notes |
+|-------------|-----------|-------|
+| 8pt | 16 | |
+| 9pt | 18 | |
+| 10pt | 20 | |
+| 10.5pt | 21 | Common CJK body size |
+| 11pt | 22 | Default Calibri body |
+| 12pt | 24 | Default TNR body |
+| 14pt | 28 | Small heading |
+| 16pt | 32 | |
+| 18pt | 36 | |
+| 20pt | 40 | |
+| 24pt | 48 | |
+| 28pt | 56 | |
+| 36pt | 72 | |
+
+## Line Spacing Values
+
+Line spacing in `w:spacing` uses the `w:line` attribute in 240ths of a line (when `w:lineRule="auto"`):
+
+| Spacing | w:line value | w:lineRule |
+|---------|-------------|-----------|
+| Single | 240 | auto |
+| 1.15 (Word default) | 276 | auto |
+| 1.5 | 360 | auto |
+| Double | 480 | auto |
+| Exact 12pt | 240 | exact |
+| At least 12pt | 240 | atLeast |
+
+Note: When `lineRule="exact"` or `"atLeast"`, `w:line` is in **twips** (DXA), not 240ths. So `line="240"` with `lineRule="exact"` means exactly 12pt (240/20 = 12pt).
+
+## Conversion Formulas
+
+```
+DXA     = inches × 1440  = cm × 567     = pt × 20
+EMU     = inches × 914400 = cm × 360000 = pt × 12700
+sz      = pt × 2          (half-points)
+```