Refactor project name from "Open Claude Design" to "Open Design" (#1)

* Refactor project name from "Open Claude Design" to "Open Design"

- Updated project name in package.json, package-lock.json, and README files.
- Changed CLI commands and references from "ocd" to "od".
- Adjusted file structure references in documentation and code to reflect new naming conventions.
- Enhanced .gitignore to include new runtime data files.
- Updated metadata in LICENSE file to match new project name.

* Add contributing guidelines in English and Chinese

- Introduced CONTRIBUTING.md and CONTRIBUTING.zh-CN.md to provide clear instructions for contributors.
- Outlined contribution types, local setup instructions, and merging criteria for skills and design systems.
- Enhanced README files to reference the new contributing guidelines.

skills/dating-web/SKILL.md

@@ -16,7 +16,7 @@ triggers:
   - "consumer dashboard"
   - "约会应用"
   - "婚恋"
-ocd:
+od:
   mode: prototype
   platform: desktop
   scenario: personal
@@ -72,7 +72,7 @@ accent, lots of negative space, *no* swipe deck or hookup tropes.
    - Background creamy off-white, body serif, mono labels everywhere.
    - Use `font-feature-settings: 'tnum'` on the metric numerals.
    - SVG bar chart with ~30 bars, varied heights.
-   - `data-ocd-id` on ticker, sidebar, kpi grid, chart, trend.
+   - `data-od-id` on ticker, sidebar, kpi grid, chart, trend.
 5. **Self-check**:
    - Reads as restrained, editorial, slightly funny — not horny.
    - Single accent token used in 3–4 places max (one KPI, two highlight