Add test support for AlmaLinux 10 (Purple Lion)

Adds test resources and test case for AlmaLinux 10.0, the latest major
release as of 2025. This RHEL-compatible distribution includes support
extending until 2035. Includes release files, os-release, and CPE
metadata for proper identification.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: nir0s

tests/resources/distros/almalinux10/etc/almalinux-release

@@ -0,0 +1 @@
+AlmaLinux release 10.0 (Purple Lion)

tests/resources/distros/almalinux10/etc/almalinux-release-upstream

@@ -0,0 +1 @@
+Derived from Red Hat Enterprise Linux 10.0

tests/resources/distros/almalinux10/etc/system-release-cpe

@@ -0,0 +1 @@
+cpe:/o:almalinux:almalinux:10::baseos

tests/resources/distros/almalinux10/usr/lib/os-release

@@ -0,0 +1,21 @@
+NAME="AlmaLinux"
+VERSION="10.0 (Purple Lion)"
+ID="almalinux"
+ID_LIKE="rhel centos fedora"
+VERSION_ID="10.0"
+PLATFORM_ID="platform:el10"
+PRETTY_NAME="AlmaLinux 10.0 (Purple Lion)"
+ANSI_COLOR="0;34"
+LOGO="fedora-logo-icon"
+CPE_NAME="cpe:/o:almalinux:almalinux:10::baseos"
+HOME_URL="https://almalinux.org/"
+DOCUMENTATION_URL="https://wiki.almalinux.org/"
+VENDOR_NAME="AlmaLinux"
+VENDOR_URL="https://almalinux.org/"
+BUG_REPORT_URL="https://bugs.almalinux.org/"
+
+ALMALINUX_MANTISBT_PROJECT="AlmaLinux-10"
+ALMALINUX_MANTISBT_PROJECT_VERSION="10.0"
+REDHAT_SUPPORT_PRODUCT="AlmaLinux"
+REDHAT_SUPPORT_PRODUCT_VERSION="10.0"
+SUPPORT_END=2035-06-01

tests/test_distro.py

@@ -438,6 +438,19 @@ def test_rocky_os_release(self) -> None:
         }
         self._test_outcome(desired_outcome)
 
+    def test_almalinux10_os_release(self) -> None:
+        desired_outcome = {
+            "id": "almalinux",
+            "name": "AlmaLinux",
+            "pretty_name": "AlmaLinux 10.0 (Purple Lion)",
+            "version": "10.0",
+            "pretty_version": "10.0 (Purple Lion)",
+            "best_version": "10.0",
+            "like": "rhel centos fedora",
+            "codename": "Purple Lion",
+        }
+        self._test_outcome(desired_outcome)
+
     def test_slackware14_os_release(self) -> None:
         desired_outcome = {
             "id": "slackware",