feat: initial open-source project structure

Agent Skill for searching and downloading torrents via TorrentClaw.
Includes SKILL.md with OpenClaw metadata, bash scripts for torrent
client detection, CONTRIBUTING.md, CHANGELOG.md, CI/CD with GitHub
Actions (shellcheck + conventional commits), lefthook git hooks,
Makefile, and .editorconfig.

.github/workflows/ci.yml

@@ -0,0 +1,53 @@
+name: CI
+
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  lint-commits:
+    name: Lint commits
+    runs-on: ubuntu-latest
+    if: github.event_name == 'pull_request'
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Validate conventional commits
+        run: |
+          base="${{ github.event.pull_request.base.sha }}"
+          head="${{ github.event.pull_request.head.sha }}"
+          pattern='^(feat|fix|docs|style|refactor|perf|test|build|ci|chore|revert)(\(.+\))?(!)?: .{1,}$'
+
+          failed=0
+          while IFS= read -r msg; do
+            first_line=$(echo "$msg" | head -1)
+            if ! echo "$first_line" | grep -qE "$pattern"; then
+              echo "FAIL: $first_line"
+              failed=1
+            fi
+          done < <(git log --format="%s" "$base".."$head")
+
+          if [ "$failed" -eq 1 ]; then
+            echo ""
+            echo "Some commits do not follow Conventional Commits format."
+            echo "Expected: <type>[scope][!]: <description>"
+            echo "See: https://www.conventionalcommits.org/"
+            exit 1
+          fi
+          echo "All commits follow Conventional Commits format."
+
+  lint-scripts:
+    name: Lint shell scripts
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Run ShellCheck
+        run: shellcheck scripts/*.sh