Exclude dependencies by name

Can we please have the possibility to exclude specific dependencies?

## Example:
```
...
dependencies {
testImplementation platform('org.junit:junit-bom:5.9.1')
implementation 'group.own.lib:own-lib:1.0.0'
}
...

cyclonedxBom {
excludes = [
'org.junit:junit-bom',
'group.own.lib:own-lib'
]
}
/* or something like
cyclonedxBom {
dependencies {
exclude(dependency('org.junit:junit-bom'))
exclude(dependency('group.own.lib:own-lib'))
}
}
*/

...
```

The issue provides no file or test path. Start by locating the cyclonedxBom configuration and the code that collects Gradle dependencies, then compare the requested name-based exclusions with existing plugin behavior. Done means the example exclusions are honored in the generated SBOM and covered by a regression test.

Written by the indexing model from the issue text.