feat: add neqo-server `--stats`, emit connection stats as JSON #12242

Job	Run time
Run checks for VM-only platforms (freebsd)	4m 34s
Run checks for VM-only platforms (netbsd)	4m 34s
Check Android (aarch64-linux-android)	4m 47s
Ensure `Cargo.lock` contains all required dependencies	12s
Run checks for VM-only platforms (openbsd)	4m 36s
Determine toolchains	7s
Check Android (x86_64-linux-android)	4m 34s
Run checks (ubuntu-24.04, 1.90.0, debug)	4m 38s
Run checks (ubuntu-24.04, stable, debug)	4m 41s
Run checks (ubuntu-24.04-arm, stable, debug)	4m 37s
Run checks (ubuntu-24.04, nightly, debug)	4m 40s
Run checks (macos-15, 1.90.0, debug)	4m 41s
Run checks (macos-15, stable, release)	4m 48s
Run checks (macos-15, nightly, debug)	4m 42s
Run checks (ubuntu-22.04, stable, debug)	4m 42s
Run checks (macos-15, stable, debug)	4m 42s
Run checks (ubuntu-24.04, stable, release)	4m 42s
Run checks (windows-2025, stable, release)	4m 43s
Run checks (windows-2025, stable, debug)	4m 39s
Run checks (windows-2025, 1.90.0, debug)	4m 42s
Run checks (windows-2025, nightly, debug)	4m 43s
Run checks (windows-2022, stable, debug)	4m 40s
Run checks (macos-14, stable, debug)	4m 47s
Run checks (ubuntu-24.04-arm, 1.90.0, debug)	4m 36s
Run checks (ubuntu-24.04-arm, nightly, debug)	4m 37s
CRAP analysis	1s
	1h 47m 45s

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