Allow ignoring dependency in group where major version is zero

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Feature description

Often times we make use of dependencies which are still in the 'initial development' stage, [section 4 of the semver spec](https://semver.org/#spec-item-4) specifies that these should be given a major version of zero (i.e. `0.y.z`). As such packages are allowed to break their public API at any point it would be useful to be able to filter these out of groups. E.g.:

```yaml
- package-ecosystem: caargo
groups:
minor:
update-types:
- minor
- patch
exclude-update-types:
- initial-development
```

Start by tracing how groups handle update-types and exclude-update-types for the cargo package ecosystem, using the YAML example and SemVer section 4 as the behavioral reference. Check existing group and update-type tests, then verify that an initial-development option can exclude updates for 0.y.z dependencies without changing other update categories.

Written by the indexing model from the issue text.