feat(irc): support optional SASL and NickServ auth (#511)

* feat(irc): support SASL and NickServ auth

* feat(irc): add missing fields

* feat(irc): support SASL and NickServ auth

* feat(irc): add missing fields

* feat(irc): add validation

* feat(indexers): unify and set required values

* feat(irc): add postgres migrations

* feat(irc): use nick as handlerkey

* feat(irc): use account for nickserv

* fix(irc): pg db migration

test/definitions/mock.yaml

@@ -29,12 +29,19 @@ irc:
   announcers:
     - _AnnounceBot_
   settings:
-    - name: nickserv.account
+    - name: nick
+      type: text
+      required: true
+      label: Nick
+      help: Bot nick. Eg. user_bot
+
+    - name: auth.account
       type: text
       required: false
       label: NickServ Account
-      help: NickServ account. Make sure to group your user and bot. Eg. user_bot
-    - name: nickserv.password
+      help: NickServ account. Make sure to group your user and bot.
+
+    - name: auth.password
       type: secret
       required: false
       label: NickServ Password