add meltano documentation

shared/tools/meltano/README.md

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+### Set up Meltano CLI
+```sh
+python3 -m pip install --user pipx
+
+pipx install meltano
+
+pipx ensurepath
+```
+
+### Run with Docker
+Link: https://docs.meltano.com/guide/containerization/
+```sh
+mkdir projects
+
+docker run -v .:/projects -w /projects meltano/meltano
+```
+
+### Set up a new Meltano replication job
+```sh
+meltano init odsdev
+
+cd ods-dev
+
+meltano add extractor tap-rest-api-msdk
+
+meltano config tap-rest-api-msdk set --interactive
+
+meltano invoke tap-rest-api-msdk
+
+meltano select tap-rest-api-msdk --list --all
+
+meltano add loader target-postgres
+
+meltano config target-postgres set --interactive
+
+meltano invoke target-postgres
+
+meltano select target-postgres --list --all
+```
+### Required Parameters
+
+For PostgreSQL:
+3. database
+11. host
+14. password
+15. port
+32. user
+
+For (public) API:
+3. API endpoint
+34. path
+
+### Notes
+- make sure to also set default_target_schema
+- secrets automatically go to .env file
+- --interactive allows you to semi-interactively set up the source and target details