custom-function-metadata should not use fs in parseTree

[wandyezj]

Expected behavior

parseTree should be exported independently without references to fs.

i.e. there should be a file called parseTree.ts that only includes parseTree code and does not include generateCustomFunctionMetadata

[akrantz]

I think what is needed here is to rename generate.ts to parseTree.ts, and then move generateCustomFunctionsMetadata() to a new generate.ts file. Then main.ts can export from both generate.ts and parseTree.ts.

[millerds]

Isn't this the main part of what @wandyezj existing PR is trying to do or am I missing something?

[wandyezj]

This was fixed by @akrantz