Shell static analysis

Add pre-commit hook for static analysis on shell scripts (shellcheck)

.pre-commit-config.yaml

@@ -12,3 +12,10 @@ repos:
   rev: 1.32.2
   hooks:
   - id: tmt-lint
+
+- repo: https://github.com/koalaman/shellcheck-precommit
+  rev: v0.10.0
+  hooks:
+  - id: shellcheck
+    require_serial: true # Podman has trouble running concurrently
+    args: ["--exclude=SC1091"] # Ignore "Not following" sourced scripts