xiaomi: Add Mi 10 `umi` and Mi 10 Lite `monet`

Change-Id: I4b350c057509fe63b23e37be3595ba110791304b
diff --git a/_xiaomi/xiaomimi10.markdown b/_xiaomi/xiaomimi10.markdown
new file mode 100644
index 0000000..e71da77
--- /dev/null
+++ b/_xiaomi/xiaomimi10.markdown
@@ -0,0 +1,13 @@
+---
+layout: device
+title:  "Xiaomi Mi 10"
+codename: umi
+downloadfolder: umi
+supportstatus: Current
+maintainer: "0xCAFEBABE"
+devicetree: https://github.com/TeamWin/android_device_xiaomi_umi.git
+oem: Xiaomi
+ddof: "/dev/block/bootdevice/by-name/recovery"
+---
+
+{% include_relative xiaomi-sm8250-common.markdown %}