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.

daemon/lint-artifact.js

@@ -143,7 +143,7 @@ export function lintArtifact(rawHtml) {
       severity: 'P0',
       id: 'left-accent-card',
       message: 'Rounded card with a coloured left border — the canonical AI-slop card pattern.',
-      fix: 'Drop either the border-radius (set 0px) or the border-left. Cards in the OCD seed use hairline borders all-round, no left accent.',
+      fix: 'Drop either the border-radius (set 0px) or the border-left. Cards in the OD seed use hairline borders all-round, no left accent.',
       snippet: clip(lam[0]),
     });
   }
@@ -262,19 +262,19 @@ export function lintArtifact(rawHtml) {
   }
 
   // ── P2-1: missing comment-mode anchor on <section> ────────────────
-  // Either `data-ocd-id` (web/mobile prototypes) or `data-screen-label`
+  // Either `data-od-id` (web/mobile prototypes) or `data-screen-label`
   // (decks) counts. Whichever the artifact uses, every <section> should
   // carry one so the chat layer can target it.
   const sections = html.match(/<section\b[^>]*>/gi) ?? [];
   const tagged = sections.filter(
-    (s) => /data-ocd-id\s*=/.test(s) || /data-screen-label\s*=/.test(s),
+    (s) => /data-od-id\s*=/.test(s) || /data-screen-label\s*=/.test(s),
   ).length;
   if (sections.length > 0 && tagged < sections.length) {
     out.push({
       severity: 'P2',
       id: 'missing-section-anchor',
-      message: `${sections.length - tagged} of ${sections.length} <section>s lack data-ocd-id (or data-screen-label).`,
-      fix: 'Add data-ocd-id="kebab-slug" (or data-screen-label="01 Cover" for slides) to every top-level <section> so comment mode can target it.',
+      message: `${sections.length - tagged} of ${sections.length} <section>s lack data-od-id (or data-screen-label).`,
+      fix: 'Add data-od-id="kebab-slug" (or data-screen-label="01 Cover" for slides) to every top-level <section> so comment mode can target it.',
     });
   }