Add Developer Certificate of Origin (DCO) and update contribution guidelines

Author: Splatcrafter

.github/dco.yml

@@ -0,0 +1,14 @@
+require:
+  members: false
+
+allowRemediationCommits:
+  individual: true
+  thirdParty: true
+
+exemptOrgs:
+  - dependabot
+  - github-actions
+
+exemptBots:
+  - dependabot[bot]
+  - copilot-swe-agent[bot]

CONTRIBUTING.md

@@ -55,4 +55,16 @@ git push origin feature/new-awesome-feature
 ## 📢 Need Help?
 If you have any questions, feel free to open an **Issue** or join our **Discussions** section.
 
+## ✨ Developer Certificate of Origin (DCO)
+
+This project uses the [Developer Certificate of Origin (DCO)](DCO) instead of a traditional CLA. By contributing, you certify that you have the right to submit your work under the project's [MIT License](LICENSE).
+
+To sign off on your commits, add the `-s` flag:
+
+```sh
+git commit -s -m "Your commit message"
+```
+
+This adds a `Signed-off-by: Your Name <your.email@example.com>` line to your commit, confirming that you agree to the DCO.
+
 🚀 **Happy Coding!**

DCO

@@ -0,0 +1,34 @@
+Developer Certificate of Origin
+Version 1.1
+
+Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+
+Developer's Certificate of Origin 1.1
+
+By making a contribution to this project, I certify that:
+
+(a) The contribution was created in whole or in part by me and I
+    have the right to submit it under the open source license
+    indicated in the file; or
+
+(b) The contribution is based upon previous work that, to the best
+    of my knowledge, is covered under an appropriate open source
+    license and I have the right under that license to submit that
+    work with modifications, whether created in whole or in part
+    by me, under the same open source license (unless I am
+    permitted to submit under a different license), as indicated
+    in the file; or
+
+(c) The contribution was provided directly to me by some other
+    person who certified (a), (b) or (c) and I have not modified
+    it.
+
+(d) I understand and agree that this project and the contribution
+    are public and that a record of the contribution (including all
+    personal information I submit with it, including my sign-off) is
+    maintained indefinitely and may be redistributed consistent with
+    this project or the open source license(s) involved.