Investigate adding support for Fortran

[taybenlor]

There's an existing package (https://wapm.io/package/f2c) that implements a Fortran77 to c program (f2c) but it doesn't seem to work. Since we already have a clang compiler, this sort of method might work. Avenues to explore:

1. Try and build our own version of f2c for WASI
2. Try and build a Fortran interpreter
3. Investigate existing Fortran -> WASM pipelines (https://github.com/StarGate01/Full-Stack-Fortran)

1 seems the easiest, but would result in a very old version of Fortran. Probably still useful for education purposes.

2 would need us to compile a Fortran interpreter, so would need a good candidate interpreter.

3 may be too difficult since it doesn't look like that pipeline could be easily compiled to WASM itself.