feat: part 1 .env changes

[royendo]

• auto-detect duplicate connector names
• common creds generated as ${key}_#
  • password, token, dsn are ${driverName}${key}#
• added feature to let user use '{{ env "key" }}
  • insensitive reference to '{{ env "key" }}, go requires all caps or no ca

PART 2 of this PR will add fallback to OS level creds. In this case, we should add visual warnings to user that this is occurring. Thinking of adding yellow text state.