Add license, code of conduct and security markdown files

[ptelang]

No description provided.

[claude]

PR Review

Issues:

• CONTRIBUTING.md:25 - Email inconsistency (stacklok.dev vs stacklok.com in CODE_OF_CONDUCT.md:58)
• CONTRIBUTING.md:54 - Missing space: -All should be - All
• CONTRIBUTING.md:56 - Broken dco.md link
• SECURITY.md:42 - Typo: contacts the us -> contacts us
• SECURITY.md:70 - Typo: being -> bring
• SECURITY.md:115 - Grammar: on in -> in

Recommendations:

1. Fix email domain consistency
2. Add dco.md or remove reference
3. Fix typos

No security, performance, or breaking change concerns.

[ptelang]

@claude check again the newest commit. Verify if the fixes were applied. Make your comment short and precise.

[claude]

Claude finished @ptelang's task —— View job

---

Verification Complete ✓

All 6 issues from the previous review have been fixed:

✅ Email consistency (stacklok.com used throughout)
✅ Space added: "- All commits" (CONTRIBUTING.md:54)
✅ dco.md file exists and link works (CONTRIBUTING.md:56)
✅ Typo fixed: "contacts us" (SECURITY.md:42)
✅ Typo fixed: "bring" (SECURITY.md:70)
✅ Grammar fixed: "in the security advisory" (SECURITY.md:115)

Status: Ready to merge.

---

Job Run | Branch: add-markdown-files

[therealnb]

I think it looks good. Can't see mistakes.