Implement core script improvements

- Add joomla_manifest.sh library with manifest parsing functions
- Add smoke_test.sh for repository validation
- Add versions.sh for version management
- Add JSON utilities to common.sh
- Fix logging.sh with proper enhanced logging functions
- Make all scripts executable

Co-authored-by: jmiller-moko <230051081+jmiller-moko@users.noreply.github.com>

scripts/lib/common.sh

@@ -102,6 +102,33 @@ normalize_path() {
 	printf '%s\n' "$1" | sed 's|\\|/|g'
 }
 
+# ----------------------------------------------------------------------------
+# JSON utilities
+# ----------------------------------------------------------------------------
+
+json_escape() {
+	require_cmd python3
+	python3 -c 'import json,sys; print(json.dumps(sys.argv[1]))' "$1"
+}
+
+json_output() {
+	local status="$1"
+	shift
+	require_cmd python3
+	python3 - <<PY "$status" "$@"
+import json
+import sys
+status = sys.argv[1]
+pairs = sys.argv[2:]
+data = {"status": status}
+for pair in pairs:
+	if "=" in pair:
+		k, v = pair.split("=", 1)
+		data[k] = v
+print(json.dumps(data, ensure_ascii=False))
+PY
+}
+
 # ----------------------------------------------------------------------------
 # Guardrails
 # ----------------------------------------------------------------------------