Add PureOS

[PR](https://github.com/quickemu-project/quickemu/pull/786) Closed with comment
I am not going to accept distros that are primarily designed for/by OEMs as they will often carry hardware-specific enablement that is unnecessary in VMs.

quickget

@@ -304,6 +304,7 @@ function os_support() {
     popos \
     porteus \
     primtux \
+    pureos \
     reactos \
     rebornos \
     rockylinux \
@@ -939,6 +940,14 @@ function editions_primtux() {
     echo 2022-10
 }
 
+function releases_pureos() {
+    echo 9.0 10.3
+}
+
+function editions_pureos() {
+    echo gnome plasma
+}
+
 function releases_reactos() {
     echo latest
 }
@@ -2579,6 +2588,26 @@ function get_primtux() {
     echo "${URL}/${ISO} ${HASH}"
 }
 
+function get_pureos() {
+    local EDITION="${1:-}"
+    local HASH=""
+    local ISO=""
+    local URL=""
+
+    case ${RELEASE} in
+      9)
+        URL="https://downloads.puri.sm/9/live/${EDITION}/2020-08-06"
+        ISO="pureos-${RELEASE}-${EDITION}-live_20200806-amd64.hybrid.iso"
+        HASH=$(wget -q -O- "${URL}/checksums.sha256sum" | grep "${ISO}" | cut -d' ' -f1)
+        ;;
+      10)
+        URL="https://downloads.puri.sm/10/${EDITION}/2023-06-14"
+        ISO="pureos-${RELEASE}-${EDITION}-live-20230614_amd64.iso"
+        HASH=$(wget -q -O- "${URL}/pureos-${RELEASE}-${EDITION}-live-20230614_amd64.checksums_sha256.txt" | head -1 | cut -d' ' -f1)
+    esac
+    echo "${URL}/${ISO} ${HASH}"
+}
+
 function get_reactos() {
     local HASH=""
     local URL=""