Rename `LFortran` namespace to `LCompilers`#534

Draft

Thirumalai-Shaktivel wants to merge 7 commits intolcompilers:mainfrom

Thirumalai-Shaktivel:rename

Commits on Nov 15, 2022

Commits on Nov 16, 2022

Move `get_executable_path` and `get_runtime_library_dir` into `libasr/utils2.cpp`
Thirumalai-Shaktivel
committed

Commits on Nov 22, 2022

Commits on Nov 23, 2022