Add file / directory name transformer

[yekver]

Right now all file /directory names are generated in a kebab-case, there can be a project specific linting rules that can fail if file / directory name is not compliant.

Thus I'd recommend to provide a new output property like format: 'camelCase' | 'PascalCase' | 'kebab-case' | 'snack_case' | 'UPPER_CASE'

[m4rvr]

So in the docs there is this, but TS errors and completely ignores it?https://orval.dev/reference/configuration/output#namingconvention