client: src: lib_gen: impl overhaul for new args

- Rewrite to support new arguments
  * Related design changes and refactoring
  * Remove prompt for testing (use `dev=on` instead)
- Factor out superscript gen from subscript append
- Related print formatting changes
- Add more internal checks

client/docker-finance.d/container/shell/superscript.bash.in

@@ -41,6 +41,7 @@ alias e='exit'
 alias grep='grep --color=auto'
 
 # All subprofiles' scripts
+# TODO: remove this tag as it's no longer needed
 @DOCKER_FINANCE_SUBPROFILE_SOURCE@
 
 # vim: syn=bash sw=2 sts=2 si ai et