Implement Sync mode

[Phanatic]

This PR implements the Sync mode for a Singer Tap connecting to PlanetScale databases.

1. Sync mode works by accepting a source_config and a catalog file which contain the connection details for the database and the schema we should sync from PlanetScale, respectively.
2. Once it has the selected catalog, it will then iterate over the Streams within the Catalog and filter out any streams that are not selected, along with any properties that are not selected.
3. Once it has all these pieces of information, it will then go retrieve the shards in the database and syncs the selected tables across all shards

Review Notes
All the code except sync.go is copied from the Airbyte Source.

Example Run

go run cmd/singer-tap/main.go --config sources/demo/source.json  --catalog sources/demo/departments.json 2> /dev/null

{"type":"SCHEMA","stream":"departments","tap_stream_id":"import-on-scaler:departments","schema":{"type":["null","object"],"additionalProperties":false,"properties":{"dept_name":{"type":["null","string"]},"dept_no":{"type":["null","string"]}}},"table-name":"departments","metadata":[{"metadata":{"selected":true,"inclusion":"available","valid-replication-keys":["dept_no"],"table-key-properties":["dept_no"],"breadcrumb":[]}},{"metadata":{"selected":true,"inclusion":"available","breadcrumb":["properties","dept_no"]}},{"metadata":{"selected":true,"inclusion":"available","breadcrumb":["properties","dept_name"]}}],"key_properties":["dept_no"],"bookmark_properties":["dept_no"]}
{"type":"RECORD","stream":"departments","time_extracted":"2022-06-23T13:06:01.200956-05:00","record":{"dept_name":"Marketing","dept_no":"d001"}}
{"type":"RECORD","stream":"departments","time_extracted":"2022-06-23T13:06:01.2011-05:00","record":{"dept_name":"Finance","dept_no":"d002"}}
{"type":"RECORD","stream":"departments","time_extracted":"2022-06-23T13:06:01.201103-05:00","record":{"dept_name":"Human Resources","dept_no":"d003"}}
{"type":"RECORD","stream":"departments","time_extracted":"2022-06-23T13:06:01.201104-05:00","record":{"dept_name":"Production","dept_no":"d004"}}
{"type":"RECORD","stream":"departments","time_extracted":"2022-06-23T13:06:01.201106-05:00","record":{"dept_name":"Development","dept_no":"d005"}}
{"type":"RECORD","stream":"departments","time_extracted":"2022-06-23T13:06:01.201108-05:00","record":{"dept_name":"Quality Management","dept_no":"d006"}}
{"type":"RECORD","stream":"departments","time_extracted":"2022-06-23T13:06:01.201113-05:00","record":{"dept_name":"Sales","dept_no":"d007"}}
{"type":"RECORD","stream":"departments","time_extracted":"2022-06-23T13:06:01.201114-05:00","record":{"dept_name":"Research","dept_no":"d008"}}
{"type":"RECORD","stream":"departments","time_extracted":"2022-06-23T13:06:01.201116-05:00","record":{"dept_name":"Customer Service","dept_no":"d009"}}
{"type":"RECORD","stream":"departments","time_extracted":"2022-06-23T13:06:01.201118-05:00","record":{"dept_name":"insert test","dept_no":"d010"}}
{"type":"RECORD","stream":"departments","time_extracted":"2022-06-23T13:06:01.201119-05:00","record":{"dept_name":"Primary mode","dept_no":"d011"}}
{"type":"RECORD","stream":"departments","time_extracted":"2022-06-23T13:06:01.201121-05:00","record":{"dept_name":"Replica mode","dept_no":"d012"}}
{"type":"RECORD","stream":"departments","time_extracted":"2022-06-23T13:06:01.201123-05:00","record":{"dept_name":"Incremental Sync 8","dept_no":"d092"}}
{"type":"RECORD","stream":"departments","time_extracted":"2022-06-23T13:06:01.201128-05:00","record":{"dept_name":"Incremental Sync 7","dept_no":"d093"}}
{"type":"RECORD","stream":"departments","time_extracted":"2022-06-23T13:06:01.201129-05:00","record":{"dept_name":"Incremental Sync 6","dept_no":"d094"}}
{"type":"RECORD","stream":"departments","time_extracted":"2022-06-23T13:06:01.201131-05:00","record":{"dept_name":"Incremental Sync 5","dept_no":"d095"}}
{"type":"RECORD","stream":"departments","time_extracted":"2022-06-23T13:06:01.201133-05:00","record":{"dept_name":"Incremental Sync 4","dept_no":"d096"}}
{"type":"RECORD","stream":"departments","time_extracted":"2022-06-23T13:06:01.201134-05:00","record":{"dept_name":"Incremental Sync 3","dept_no":"d097"}}
{"type":"RECORD","stream":"departments","time_extracted":"2022-06-23T13:06:01.201138-05:00","record":{"dept_name":"Incremental Sync 2","dept_no":"d098"}}
{"type":"RECORD","stream":"departments","time_extracted":"2022-06-23T13:06:01.201139-05:00","record":{"dept_name":"Incremental Sync","dept_no":"d099"}}