Draft Create Auto Detect .gradle file during Java detection

**Is your feature request related to a problem? Please describe.**
When running `draft create` on the following repo, draft prompts for gradle or maven https://github.com/codecov/example-java-gradle

```
[Draft] --- Detecting Language ---
Use the arrow keys to navigate: ↓ ↑ → ←
? Linguist detected Java, are you using maven or gradle?:
> gradle
maven
```

**Mention what platform you want to support the new feature**
OSS

**Describe the solution you'd like**
Draft should detect the *.gradle files in a repository to determine if gradle is used.

**Describe alternatives you've considered**
A better method for detecting gradle or maven could be used. The build files are the best way I could determine.

**Additional context**
(none)