Add Gitea Runner Lume (#195)

I built this so I can notorize mac apps in my Gitea Actions.

It allows you to host a Gitea Runner on your Apple Hardware using Lume.

It creates and runs fresh macOS virtual machines on Apple Silicon, enabling Gitea Actions workflows to build and test Xcode and other macOS projects in isolated environments.

![CleanShot 2026-08-07 at 21.29.00@2x.png](/attachments/ac5b91a5-c7c3-4646-88c0-c4a049716878)

Once installed you can run jobs:

```yaml
jobs:
  test:
    runs-on: xcode-16
    steps:
      - uses: actions/checkout@v4
      - run: swift test
```

It starts a brand new macOS VM, does the action jobs, then destroys the VM, meaning you have a clean mac environment for every job.

Reviewed-on: https://gitea.com/gitea/awesome-gitea/pulls/195
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: Mark Wylde <mark@wylde.net>

README.md

@@ -107,6 +107,7 @@ Zenith Hosting offers Gitea as a one-click deployment option on the platform. Th
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