Use boost for JSON parsing #668

Job	Run time
Build (ubuntu:noble, gcc, LEGACY, OFF, true)	1m 6s
Build (ubuntu:noble, clang, LEGACY, OFF, true)	1m 5s
Build (ubuntu:noble, gcc, GLVND, OFF, true)	1m 3s
Build (ubuntu:noble, clang, GLVND, OFF, true)	1m 8s
Build (linuxmintd/mint22-amd64, clang, GLVND, OFF, true)	1m 51s
Build (debian:bookworm, clang, GLVND, OFF, false)	1m 13s
Build (debian:bullseye, clang, GLVND, OFF, false)	1m 35s
Build (opensuse/leap:15.6, clang, LEGACY, ON, true)	1m 6s
Build (opensuse/leap:15.6, clang, GLVND, ON, true)	1m 9s
Build (opensuse/leap:15.5, clang, LEGACY, ON, true)	1m 11s
Build (opensuse/leap:15.5, clang, GLVND, ON, true)	1m 30s
Build (opensuse/leap:15.4, clang, GLVND, ON, false)	1m 28s
Build (fedora:39, clang, LEGACY, ON, true)	12m 26s
Build (fedora:39, clang, GLVND, ON, true)	12m 33s
Build (fedora:40, clang, LEGACY, ON, true)	12m 20s
Build (fedora:40, clang, GLVND, ON, false)	12m 46s
Build (rockylinux_rockylinux:9.4, clang, GLVND, ON, false)	1m 41s
	1h 7m 11s

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