add visualization repo for sig

sigs/visualization/README.md

+# MindSpore Visualization Special Interest Group (SIG)
+
+This is the working repo for the `Visualization` special interest group (SIG). This repo contains all the artifacts, materials, meeting notes and proposals regarding **mindinsight** in MindSpore. Feedbacks and contributions are welcome.
+
+# SIG Leads
+
+* Gao congli (Huawei)
+
+# Logistics
+
+* SIG leads will drive the meeting.
+* Meeting annoucement will be posted on our gitee channel: https://gitee.com/mindspore/community/tree/master/sigs/visualization
+* Feedbacks and topic requests are welcome by all.
+
+# Discussion
+
+* Slack channel https://app.slack.com/client/TUKCY4QDR/C0119H4M5KJ/details/members?cdn_fallback=2
+* Documents and artifacts: https://gitee.com/mindspore/community/tree/master/sigs/visualization
+
+# Meeting notes
+
+

sigs/visualization/meetings/meeting-template.md

+# Thursday April 2, 2020 at 21:30pm GMT+8
+
+## Agenda
+
+
+## Conference links
+
+
+## Attendees 
+* Tom (Huawei)
+
+
+## Notes
+* TODO
+
+## Action items
+* TODO