[feat] Added input arg and version, help and out flags.

[neogeek]

This adds CLI input and flags to onlybuild. Now you can choose where the source files are located, the build directory,

Pull Request Type

• Bugfix
• Enhancement
• Documentation
• Other (please describe):

Relevant Issues

n/a

What was the behavior before this feature/fix?

You couldn't change anything with how onlybuild runs.

What is the behavior after this feature/fix?

1. The user can change where the source files are located. Default is the current directory.
2. The user can change where the build files are created. Default is build/.
3. The user can change the path of the ignore file. Default is .onlyignore.
4. The user can show the version of onlybuild
5. The user can how the CLI help message.

Benchmark Results

No change.

Other Information