Add eve foss2022b toolchain, fix eve nag version, add eve env-vars F77 CC CXX

Add eve foss2022b toolchain, fix eve nag version, add eve env-vars F77 CC CXX

README.md

@@ -6,7 +6,7 @@ Module load scripts on HPC Clusters for Fortran Projects at CHS.
 
 All these scripts will load:
 
-- the respective fortran compiler and set `FC` env-var (optional MPI support)
+- the respective compilers and set `FC`, `F77`, `CC` and `CXX` env-var (optional MPI support)
 - netCDF-Fortran
 - CMake
 - the MPR Python Environment (_except chs-conda environment_)
@@ -37,6 +37,11 @@ All these scripts will load:
   source eve.gfortran102 # or
   source eve.gfortran102MPI
   ```
+- GNU 12.2 compiler (`foss/2022b` Toolchain):
+  ```bash
+  source eve.gfortran122 # or
+  source eve.gfortran122MPI
+  ```
 - Intel 18 compiler (`iomkl/2018b` Toolchain):
   ```bash
   source eve.intel18 # or