mysql destination docs (#3275)

* setup doc for mysql destination

* update the documentation in right places

docs/integrations/destinations/mysql.md

@@ -0,0 +1,59 @@
+# MySQL
+
+## Overview
+
+The Airbyte MySQL destination allows you to sync data to MySQL.
+
+### Sync overview
+
+#### Output schema
+
+Each stream will be output into its own table in MySQL. Each table will contain 3 columns:
+
+* `_airbyte_ab_id`: a uuid assigned by Airbyte to each event that is processed. The column type in MySQL is `VARCHAR(256)`.
+* `_airbyte_emitted_at`: a timestamp representing when the event was pulled from the data source. The column type in MySQL is `TIMESTAMP(6)`.
+* `_airbyte_data`: a json blob representing with the event data. The column type in MySQL is `JSON`.
+
+#### Features
+
+| Feature | Supported?\(Yes/No\) | Notes |
+| :--- | :--- | :--- |
+| Full Refresh Sync | Yes |  |
+| Incremental - Append Sync | Yes |  |
+| Namespaces | Yes |  |
+
+## Getting started
+
+### Requirements
+
+To use the MySQL destination, you'll need:
+
+* A MySQL database version 5.7.8 or above
+
+### Setup guide
+
+#### Network Access
+
+Make sure your MySQL database can be accessed by Airbyte. If your database is within a VPC, you may need to allow access from the IP you're using to expose Airbyte.
+
+#### **Permissions**
+
+You need a MySQL user with `CREATE, INSERT, SELECT, DROP` permissions. We highly recommend creating an Airbyte-specific user for this purpose.
+
+#### Target Database
+
+MySQL doesn't differentiate between a database and schema. A database is essentially a schema where all the tables live in. You will need to choose an existing database or create a new database. This will act as a default database/schema where the tables will be created if the source doesn't provide a namespace.
+
+### Setup the MySQL destination in Airbyte
+
+Before setting up MySQL destination in Airbyte, you need to set the [local_infile](https://dev.mysql.com/doc/refman/8.0/en/server-system-variables.html#sysvar_local_infile) 
+system variable to true. You can do this by running the query `SET GLOBAL local_infile = true` with a user with [SYSTEM_VARIABLES_ADMIN](https://dev.mysql.com/doc/refman/8.0/en/privileges-provided.html#priv_system-variables-admin) permission. 
+This is required cause Airbyte uses `LOAD DATA LOCAL INFILE` to load data into table.
+
+You should now have all the requirements needed to configure MySQL as a destination in the UI. You'll need the following information to configure the MySQL destination:
+
+* **Host**
+* **Port**
+* **Username**
+* **Password**
+* **Database**