fix: add explicit permissions to all GitHub Actions workflows #1047

Job	Run time
Integration tests against aws-guard-rules-registry for Windows	3m 10s
Testing Install Script (install-guard.sh) (macos-latest)	8s
Shellcheck	7s
Testing Windows Install Script (install-guard.ps1)	19s
Build all crates & run unit tests (ubuntu-latest)	2m 53s
Build all crates & run unit tests (macos-latest)	3m 29s
Testing Install Script (install-guard.sh) (ubuntu-latest)	7s
Build all crates & run unit tests (windows-latest)	5m 25s
Integration tests against aws-guard-rules-registry (ubuntu-latest)	1m 37s
Spell Check with Typos	8s
Run Fuzz Checks (yaml)	9m 14s
Linting check (clippy)	29s
Formatting check (cargo fmt)	18s
Integration tests against aws-guard-rules-registry (macos-latest)	2m 3s
Run Fuzz Checks (guard_dsl)	9m 12s
	38m 39s

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