Write proper fortran

[dengwirda]

Based on some quick checks (compiling with -pedantic -Wall -Wextra) there are a bunch of outstanding code compliance issues that should be fixed to suppress warnings, and enable proper cross-platform/cross-compiler builds, etc.

Thanks to @mark-petersen, Nicholas Kevlahan for help with this so far!

[chadbrewbaker]

This code would be an amazing port for Mojo if you are interested. Put the Mojo in a test folder, incrementally get it working logically the same, then use MOJO profiling and MLIR tricks for speedup. Modular MAKEFILE like like llama.cpp so the FORTRAN can link the MOJO optimized assembler as an option.