Initial commit: add Gitea PyPI publish workflow

PLAN.md

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+# Plan: Add async examples to the wiki usage guide
+
+The `docs/usage.md` guide currently only shows sync usage in its per-section examples. The user wants every major example to also demonstrate the equivalent async pattern with `AsyncConduitClient` and `await`.
+
+## Approach
+
+1. Keep the existing sync examples intact.
+2. Add matching async examples immediately after each sync snippet (Authentication, Gateway keys/SMS/media/torrents/wiki/compute/DNS, timeouts/retries, error handling, free-form bodies).
+3. Make the pattern consistent across all snippets:
+   - sync: `with ConduitClient(...) as client:`
+   - async: `async with AsyncConduitClient(...) as client:` and `await client...`
+4. Ensure required imports (`asyncio`, `AsyncConduitClient`) are shown where needed.
+5. Run `ruff` and `pytest` to confirm nothing broke.