ci(fix): sync ci workflows (#28)

Description
Bring CI workflows in line with tari-project

Motivation and Context
Make future maintenance easier. 

How Has This Been Tested?
---

What process can a PR reviewer use to test or verify this change?
---

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Breaking Changes
---

- [x] None
- [ ] Requires data directory on base node to be deleted
- [ ] Requires hard fork
- [ ] Other - Please specify

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<!-- BREAKING CHANGE: Description what the user should do, e.g. delete a
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.github/workflows/pr_signed_commits_check.yml

@@ -0,0 +1,19 @@
+---
+# Checks if the comments are signed or not
+name: PR - Signed commits check
+
+'on':
+  pull_request_target
+
+permissions: {}
+
+jobs:
+  check-signed-commits:
+    name: Check signed commits in PR
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      pull-requests: write
+    steps:
+      - name: Check signed commits in PR
+        uses: 1Password/check-signed-commits-action@v1

CODEOWNERS

@@ -0,0 +1,3 @@
+# CI/CD-related files require a review by the devops team
+.github/**/* @tari-project/devops
+CODEOWNERS @tari-project/devops