Absolute paths reuse absolute path within spec folder

Current Behaviour:

codegen /Users/vinnyglennon/src/app/models/redirect.rb

Finding matcher for /Users/vinnyglennon/src/app/models/redirect.rb...
Test file path: spec/Users/vinnyglennon/src/models/redirect_spec.rb
Creating test file if it doesn't exist...
Running codegen...

Expected Behaviour

codegen /Users/vinnyglennon/src/app/models/redirect.rb

Finding matcher for /Users/vinnyglennon/src/app/models/redirect.rb...
Test file path: spec/models/redirect_spec.rb
Creating test file if it doesn't exist...
Running codegen...

Relative paths work fine:

codegen app/models/redirect.rb

Finding matcher for app/models/redirect.rb...
Test file path: spec/models/redirect_spec.rb
Creating test file if it doesn't exist...
Running codegen...

We should have a really good default setting that requires no setup, but ideally make the thing extensible enough that we can have different models do the completion

This should probably be an environment variable:

https://github.com/ferrucc-io/dotcodegen/blob/main/lib/dotcodegen/test_code_generator.rb#L58

For some reason half the completions I do still include ``` at the beginning and end of the code

Would be nice to detect this upfront and strip this out