feat: initial commit — unarr CLI

Search, inspect, stream, and download torrents from the terminal.
Replaces the entire *arr stack with a single binary.

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,24 @@
+## Summary
+
+<!-- What does this PR do? Keep it to 1-3 bullet points. -->
+
+-
+
+## Related Issues
+
+<!-- Link any related issues: Fixes #123, Closes #456 -->
+
+## Test Plan
+
+<!-- How did you verify this works? -->
+
+- [ ] Tests pass (`make test`)
+- [ ] Linter passes (`make lint`)
+- [ ] Tested manually (describe below)
+
+## Checklist
+
+- [ ] Code follows the project style (`make fmt && make vet`)
+- [ ] Tests added for new functionality
+- [ ] Documentation updated (if public API changed)
+- [ ] Commit messages follow [Conventional Commits](https://www.conventionalcommits.org/)