feat: add cb7 filetype #3009

Job	Run time
check_if_pr	3s
security_audit	25s
no-merge-commits	5s
Conventional Commits	6s
unit-tests-freebsd (msrv)	2m 29s
unit-tests-freebsd (stable)	2m 32s
unit-tests-netbsd (stable)	2m 37s
unit-tests-freebsd (nightly)	2m 32s
unit-tests-freebsd (beta)	2m 32s
unit-tests-netbsd (msrv)	2m 34s
unit-tests (ubuntu-latest, msrv)	2m 38s
unit-tests-netbsd (beta)	1m 54s
unit-tests-openbsd	8m 55s
unit-tests (ubuntu-latest, nightly)	2m 33s
unit-tests (ubuntu-latest, beta)	2m 38s
unit-tests (ubuntu-latest, stable)	2m 16s
unit-tests-netbsd (nightly)	20s
unit-tests (macos-latest, msrv)	45s
unit-tests (macos-latest, stable)	2m 19s
Build Nix package (x86_64-linux)	4m 32s
unit-tests (macos-latest, nightly)	2m 39s
Check Nix Flake (pre-commit-check, x86_64-linux)	37s
Check Nix Flake (lint, x86_64-linux)	2m 10s
unit-tests (macos-latest, beta)	2m 25s
unit-tests (windows-latest, nightly)	4m 21s
Check Nix Flake (formatting, x86_64-linux)	37s
unit-tests (windows-latest, msrv)	4m 36s
unit-tests (windows-latest, stable)	4m 14s
unit-tests (windows-latest, beta)	4m 51s
Check Nix Flake (test, x86_64-linux)	3m 48s
Check Nix Flake (build, x86_64-linux)	2m 10s
Check Nix Flake (trycmd, x86_64-linux)	2m 14s
	1h 19m 27s

Provide feedback