userguide/eve: format and reorganize alert section #7193

Job	Run time
Prepare cbindgen	1m 2s
Prepare dependencies	1m 19s
AlmaLinux 9	16m 43s
Fedora 38 (clang, debug, asan, wshadow, rust-strict, systemd)	8m 48s
Fedora 38 (gcc, debug, asan, wshadow, rust-strict)	7m 46s
AlmaLinux 8	14m 20s
Debian 10	10m 48s
Fedora 36 (debug, clang, asan, wshadow, rust-strict)	12m 13s
Fedora 37 (clang, debug, asan, wshadow, rust-strict, systemd)	7m 38s
Fedora 37 (gcc, debug, asan, wshadow, rust-strict)	8m 42s
MacOS Latest	16m 8s
Ubuntu 20.04 (-DNDEBUG)	9m 55s
Ubuntu 20.04 (no nss, no nspr)	8m 24s
Ubuntu 22.04 (Cocci)	39m 54s
Ubuntu 22.04 (Debug Validation)	9m 29s
Windows MSYS2 MINGW64 (libpcap)	24m 56s
Windows MSYS2 MINGW64 (NPcap)	30m 58s
Ubuntu 22.04 (Fuzz)	8m 31s
Windows MSYS2 MINGW64 (WinDivert)	23m 15s
CentOS 7	20m 4s
Ubuntu 20.04 (MSRV)	6m 33s
Ubuntu 20.04 (unsupported rust)	1m 38s
	4h 49m 4s

Provide feedback