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.

src/types.ts

@@ -86,7 +86,7 @@ export interface SkillSummary {
   upstream: string | null;
   /** Lower number = higher priority in the Examples gallery. `null` keeps
    *  the skill in its natural alphabetical position below all featured
-   *  entries. Set via `ocd.featured` in the SKILL.md frontmatter. */
+   *  entries. Set via `od.featured` in the SKILL.md frontmatter. */
   featured?: number | null;
   hasBody: boolean;
   examplePrompt: string;