chore: anonymize internal URLs for public release

Replace git.wxs.ro with forgejo.example.com in tests and docs.
Add public repo guidelines to CLAUDE.md.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

test/m7-integration.test.ts

@@ -70,7 +70,7 @@ describe("M7: Platform routing for mode handlers", () => {
     it('returns "forgejo" when GITHUB_SERVER_URL is not github.com', () => {
       delete process.env.PLATFORM;
       delete process.env.FORGEJO;
-      process.env.GITHUB_SERVER_URL = "https://git.wxs.ro";
+      process.env.GITHUB_SERVER_URL = "https://forgejo.example.com";
       expect(detectPlatform()).toBe("forgejo");
     });
 
@@ -139,7 +139,7 @@ describe("M7: Forgejo PR compare URL format", () => {
     );
 
     const url = createForgejoPrCompareUrl(
-      "https://git.wxs.ro",
+      "https://forgejo.example.com",
       "owner",
       "repo",
       "main",
@@ -150,7 +150,7 @@ describe("M7: Forgejo PR compare URL format", () => {
 
     expect(url).toContain("expand=1");
     expect(url).not.toContain("quick_pull=1");
-    expect(url).toContain("git.wxs.ro");
+    expect(url).toContain("forgejo.example.com");
     expect(url).toContain("compare/main...claude/fix-bug");
   });
 });
@@ -167,10 +167,10 @@ describe("M7: unified updateCommentBody handles both platforms", () => {
 
     const result = updateCommentBody({
       currentBody:
-        "Claude Code is working… ⏳\n\nI'll analyze this and get back to you.\n\n[View job run](https://git.wxs.ro/owner/repo/actions/runs/123)",
+        "Claude Code is working… ⏳\n\nI'll analyze this and get back to you.\n\n[View job run](https://forgejo.example.com/owner/repo/actions/runs/123)",
       actionFailed: false,
       executionDetails: { duration_ms: 30000 },
-      jobUrl: "https://git.wxs.ro/owner/repo/actions/runs/123",
+      jobUrl: "https://forgejo.example.com/owner/repo/actions/runs/123",
       triggerUsername: "testuser",
     });