Consider add gentype suffix to generate file name

[nhducit]

Current behavior

source file:

Greeting.re

generate 2 files:

Greeting.bs.js
Greeting.tsx

Motivation:
I don't want to add Greeting.bs.js and Greeting.tsx to git repository. For .bs.js files it is quite easy to add them to .gitignore file. But for generated tsx files, there is no easy way to know which tsx file is generated by genType.

Propose changes:

• Change generate file name from Greeting.tsx to Greeting.xxx.tsx. for example: Greeting.gentype.tsx for Greeting.gt.tsx
• This rule should apply for ts files also
• Should we apply this rule for flowtype?

Impact:

• It is a breaking change

[cristianoc]

See how things would look like in #87.
Feel free to play with that and report back.
It's definitely possible to make the extension configurable.

[cristianoc]

Looks like .re.tsx is problematic for webpack but e.g. .gt.tsx works.

[ryyppy]

I just opened the issue tab to discuss a similar problem for .re.js files.
It would be cool if the user could configure the file-extension in the bsconfig.json / gentypeconfig section.

That would be especially useful in environments where you can't manipulate the resolver logic, like with create-react-app.

[cristianoc]

@ryyppy added configuration option, e.g. "generatedFileExtension": ".gt"

[cristianoc]

This is now in master.

[nhducit]

wow. it is super fast. Thank you @cristianoc @ryyppy