Add Loading data from bronze to Silver.sql script

Add data load form source to bronze.sql

Add placeholder to silver.sql

Add placeholder to gold.sql

Add placeholder to bronze.sql

Add placeholder content to ph.md

Add placeholder content to ph.md

Add placeholder content to ph.md

Add placeholder text to tests_PH.md

Add placeholder text to scripts_ph.md

Add placeholder content to docs_pl.md

Add placeholder content to pl.md

Initial commit