docs(swf): refactoring swf into chf and olf chapters #3581

Job	Run time
Build	2m 26s
Check format	1m 50s
Smoke test	5m 51s
Test Intel fortran (ubuntu-22.04)	42m 43s
Extended testing (ubuntu-22.04)	18m 50s
Test Intel fortran (macos-13)	35m 26s
Extended testing (macos-13)	45m 12s
Test GNU fortran (macos-13, false)	26m 12s
Test Intel fortran (windows-2022)	35m 45s
Extended testing (windows-2022)	54m 18s
Test GNU fortran (macos-14, false)	20m 32s
Test GNU fortran (macos-14, true)	34m 26s
Test GNU fortran (ubuntu-22.04, false)	37m 41s
Test GNU fortran (ubuntu-22.04, true)	1h 32m 22s
Test GNU fortran (windows-2022, false)	34m 32s
	8h 8m 6s

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