Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/channels/db/migrations/postgres/000084_recent_searches.up.sql

@@ -0,0 +1,7 @@
+CREATE TABLE IF NOT EXISTS recentsearches (
+    userid CHAR(26),
+    searchpointer int,
+    query jsonb,
+    createat bigint NOT NULL,
+    PRIMARY KEY (userid, searchpointer)
+);