feat(GWE): Introduce Groundwater Energy Transport #1609

Job	Run time
Check format	1m 26s
Build	1m 18s
Smoke test	4m 11s
Test gnu fortran (ubuntu-22.04)	23m 38s
Test gnu fortran (macos-12)	27m 26s
Parallel testing (ubuntu-22.04)	9m 2s
Test intel fortran (ubuntu-22.04, intel-classic, 2021.7)	24m 58s
Test gnu fortran (windows-2022)	32m 47s
Parallel testing (macos-12)	16m 43s
Test intel fortran (macos-12, intel-classic, 2021.7)	24m 11s
Test intel fortran (windows-2022, intel-classic, 2021.7)	31m 55s
	3h 17m 35s

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