docs(plugins): add meilisearch plugins

Author: LinkinStars

plugins.txt

@@ -4,4 +4,5 @@ github.com/answerdev/answer-github-connector
 github.com/answerdev/answer-google-connector
 github.com/answerdev/answer-es-search
 github.com/answerdev/answer-aliyunoss-storage
-github.com/answerdev/answer-s3-storage
+github.com/answerdev/answer-s3-storage
+github.com/sivdead/answer-meilisearch-search