Add support for Hugo modules

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Feature description

Hi, is it possible to add support for [Hugo modules](https://gohugo.io/hugo-modules/use-modules/#prerequisite), which base on Golang Modules?

I set up the Dependabot on my repo with `gomod`, but found that `go.mod` and `go.sum` will be emptied.

Related Config:

```yaml
version: 2
updates:
- package-ecosystem: "gomod"
directory: "/"
schedule:
interval: "daily"

- package-ecosystem: "gomod"
directory: "/modules/blog"
schedule:
interval: "daily"

- package-ecosystem: "gomod"
directory: "/modules/meta/recommended"
schedule:
interval: "daily"
allow:
- dependency-type: "all"
```

Related PRs:

- https://github.com/razonyang/hb/pull/208/files
- https://github.com/razonyang/hb/pull/209/files
- https://github.com/razonyang/hb/pull/210/files

Is there a way to replace the `go get` and `go mod tidy` with `hugo mod get` and `hugo mod tidy` respectively?

Start by comparing the existing gomod handling for go.mod and go.sum with Hugo's module prerequisites and the requested hugo mod get and hugo mod tidy commands. Use the supplied Dependabot configuration and related PRs as reproduction material; done means Hugo module files are preserved and updated without being emptied.

Written by the indexing model from the issue text.