Add podman Quadlet modules

This commit introduces two new modules for managing Podman Quadlets:

- podman_quadlet: Install and remove Podman Quadlet files
  * Supports installing single files, directories, and additional config files
  * Implements idempotent state management (present/absent)
  * Validates parameters and provides meaningful error messages
  * Default force=true for removal operations
  * Removed deprecated 'ignore' parameter in favor of built-in idempotency

- podman_quadlet_info: Gather information about installed Quadlets
  * Lists all installed quadlets or prints specific quadlet content
  * Supports filtering by quadlet kinds (container, pod, network, etc.)
  * Provides detailed quadlet metadata including status and paths

Key features:
- Shared utilities in module_utils/podman/quadlet.py for code reuse
- Comprehensive integration tests for both modules
- Full idempotency support for all operations
- Proper handling of edge cases (missing files, malformed quadlets, etc.)
- Check mode support for safe dry-run operations
- Extensive documentation and examples

The modules use relative imports for module_utils to support local
development and testing with the containers.podman collection.

Signed-off-by: Sagi Shnaidman <sshnaidm@redhat.com>

plugins/module_utils/podman/quadlet.py

@@ -15,6 +15,30 @@ from ansible_collections.containers.podman.plugins.module_utils.podman.common im
 QUADLET_ROOT_PATH = "/etc/containers/systemd/"
 QUADLET_NON_ROOT_PATH = "~/.config/containers/systemd/"
 
+# https://github.com/containers/podman/blob/main/pkg/systemd/quadlet/quadlet_common.go
+QUADLET_SUFFIXES = [
+    ".artifact",
+    ".container",
+    ".volume",
+    ".kube",
+    ".network",
+    ".image",
+    ".build",
+    ".pod",
+    ".quadlets",
+]
+
+
+def resolve_quadlet_dir(module):
+    quadlet_dir = module.params.get("quadlet_dir")
+    if not quadlet_dir:
+        user_is_root = os.geteuid() == 0
+        if user_is_root:
+            quadlet_dir = QUADLET_ROOT_PATH
+        else:
+            quadlet_dir = os.path.expanduser(QUADLET_NON_ROOT_PATH)
+    return quadlet_dir
+
 
 class Quadlet:
     param_map = {}