reorder fortran header for opts struct, fixes #593 #474

Job	Run time
prepare	4s
Build with Pip (ubuntu-22.04, 3.8, llvm, -march=native)	1m 11s
Build with Pip (ubuntu-22.04, 3.8, llvm, -march=x86-64)	1m 6s
Build with Pip (ubuntu-22.04, 3.8, gcc, -march=native)	59s
Build with Pip (ubuntu-22.04, 3.8, gcc, -march=x86-64)	1m 2s
Build with Pip (ubuntu-22.04, 3.11, llvm, -march=native)	1m 18s
Build with Pip (ubuntu-22.04, 3.11, llvm, -march=x86-64)	1m 7s
Build with Pip (ubuntu-22.04, 3.11, gcc, -march=native)	56s
Build with Pip (ubuntu-22.04, 3.11, gcc, -march=x86-64)	1m 0s
Build with Pip (windows-2022, 3.8, msvc, /arch:AVX2)	12m 3s
Build with Pip (windows-2022, 3.8, msvc, /arch:SSE2)	11m 57s
Build with Pip (windows-2022, 3.8, llvm, /arch:AVX2)	11m 51s
Build with Pip (windows-2022, 3.8, llvm, /arch:SSE2)	11m 24s
Build with Pip (windows-2022, 3.11, msvc, /arch:AVX2)	11m 26s
Build with Pip (windows-2022, 3.11, msvc, /arch:SSE2)	11m 43s
Build with Pip (windows-2022, 3.11, llvm, /arch:AVX2)	12m 16s
Build with Pip (windows-2022, 3.11, llvm, /arch:SSE2)	12m 11s
Build with Pip (macos-13, 3.8, llvm, -march=native)	2m 46s
Build with Pip (macos-13, 3.8, llvm, -march=x86-64)	2m 49s
Build with Pip (macos-13, 3.8, gcc-14, -march=native)	1m 56s
Build with Pip (macos-13, 3.8, gcc-14, -march=x86-64)	1m 56s
Build with Pip (macos-13, 3.11, llvm, -march=native)	4m 15s
Build with Pip (macos-13, 3.11, llvm, -march=x86-64)	3m 32s
Build with Pip (macos-13, 3.11, gcc-14, -march=native)	2m 23s
Build with Pip (macos-13, 3.11, gcc-14, -march=x86-64)	2m 17s
	2h 5m 28s

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