feature: add users and MAINTAINERS.md (#1062)

Signed-off-by: maybaby <ybyang7@iflytek.com>

MAINTAINERS.md

@@ -0,0 +1,20 @@
+maintainers:
+
+- fanux
+- cuisongliu
+- ysicing
+- oldthreefeng
+- zhangguanzhang
+- berlinsaint
+
+reviewers:
+
+- fanux
+- cuisongliu
+- berlinsaint
+
+approvers:
+
+- fanux
+- cuisongliu
+- berlinsaint

USERS.md

@@ -0,0 +1,18 @@
+## Sealos User Community Surveys & Feedback
+
+## Who uses Sealos?
+
+As the Sealos Community grows, we'd like to keep track of our users. Please send a PR with your organization or project
+name in the following sections.
+
+### Organizations Using Sealos
+
+Currently, the following organizations are **officially** using Sealos:
+
+1. [Iflytek](https://www.iflytek.com/)
+
+### Projects Using Sealos
+
+In addition, the following projects are **officially** using Sealos:
+
+1. [demo](https://github.com/demo)