chore: Configure Renovate (#3)

Welcome to [Renovate](https://github.com/renovatebot/renovate)! This is an onboarding PR to help you understand and configure settings before regular Pull Requests begin.

🚦 To activate Renovate, merge this Pull Request. To disable Renovate, simply close this Pull Request unmerged.

---
### Detected Package Files

 * `.gitea/workflows/cd.yaml` (github-actions)
 * `.gitea/workflows/ci.yaml` (github-actions)
 * `package.json` (npm)
 * `.nvmrc` (nvm)

### What to Expect

With your current configuration, Renovate will create 3 Pull Requests:

<details>
<summary>chore(deps): update actions/checkout action to v5</summary>

  - Schedule: ["at any time"]
  - Branch name: `renovate/actions-checkout-5.x`
  - Merge into: `main`
  - Upgrade [actions/checkout](https://github.com/actions/checkout) to `v5`

</details>

<details>
<summary>chore(deps): update dependency conventional-commits-parser to v6</summary>

  - Schedule: ["at any time"]
  - Branch name: `renovate/conventional-commits-parser-6.x`
  - Merge into: `main`
  - Upgrade [conventional-commits-parser](https://github.com/conventional-changelog/conventional-changelog) to `^6.0.0`

</details>

<details>
<summary>chore(deps): update dependency node to v22</summary>

  - Schedule: ["at any time"]
  - Branch name: `renovate/node-22.x`
  - Merge into: `main`
  - Upgrade [node](https://github.com/nodejs/node) to `22`

</details>

---

❓ Got questions? Check out Renovate's [Docs](https://docs.renovatebot.com/), particularly the Getting Started section.
If you need any further assistance then you can also [request help here](https://github.com/renovatebot/renovate/discussions).

---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).

<!--renovate-config-hash:94693a990c975907e7f13da3309b9d56ba02b3983519b41786edf5cf031e457c-->

Reviewed-on: #3
Co-authored-by: Renovate Bot <renovate@t00n.de>
Co-committed-by: Renovate Bot <renovate@t00n.de>

renovate.json

@@ -0,0 +1,3 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json"
+}

src/main.spec.ts

@@ -246,6 +246,16 @@ describe("TagIncrementer", () => {
 
       expect(result).toBe(IncrementType.MINOR);
     });
+
+    it("should fallback to PATCH on an non-conventional commit message", async () => {
+      mockGitService.setMockCommit({
+        commit: { message: "just some tests, nothing special" },
+      });
+
+      const result = await tagIncrementer.determineIncrementType("ref");
+
+      expect(result).toBe(IncrementType.PATCH);
+    });
   });
 
   describe("incrementTag", () => {