feat(skd-compile): compact AreaTemplate DSL, fix dataPath and presentation fallback

- Fix empty dataPath when field is specified as object { field, title }
- Add title to presentation fallback chain: presentation → title → name
- Add compact DSL for AreaTemplate: rows/widths/style instead of raw XML
- Built-in style presets: header, data, subheader, total
- User-defined presets via skd-styles.json (project-level overrides)
- Support vertical merge ("|"), parameters ("{Name}"), static text, null cells
- Update SKILL.md, skd-dsl-spec.md, skd-guide.md with template DSL docs
- Add examples/skd-styles.json with all supported keys
- Bump version v1.1 → v1.2

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.claude/skills/skd-compile/examples/skd-styles.json

@@ -0,0 +1,30 @@
+{
+  "header": {
+    "font": "Arial",
+    "fontSize": 10,
+    "bold": false,
+    "italic": false,
+    "hAlign": "Center",
+    "vAlign": "Center",
+    "wrap": true,
+    "bgColor": "style:ReportHeaderBackColor",
+    "textColor": null,
+    "borderColor": "style:ReportLineColor",
+    "borders": true
+  },
+  "data": {
+    "bgColor": "style:ReportGroup1BackColor",
+    "borderColor": "style:ReportLineColor"
+  },
+  "total": {
+    "bold": true,
+    "borderColor": "style:ReportLineColor"
+  },
+  "myProjectStyle": {
+    "bgColor": "#FFE0E0",
+    "textColor": "#990000",
+    "fontSize": 12,
+    "bold": true,
+    "hAlign": "Right"
+  }
+}