refactor(Tool)!: run->loadTest, config->initSql

[bartelink]

Aligns the Tool's commandline processing with that of Propulsion.Tool (i.e. more evolved patterns for commandline parsing)

• Minor tweaks re/ as a side-effect of https://github.com/fsprojects/Argu/issues/171
• rename the Tool's run Subcommand to the more 'say what you see' loadTest
• rename the mysterious-sounding config to initSql to align with propulsion init/initAws etc and https://github.com/jet/propulsion/pull/249
• minor polishing of CosmosQuery (follow-ups to #444)
• re-ordering (no logic changes to stuff reordered other than CosmosQuery)
• move LoadTest logic to separate file, as it's not really part of the tool in any significant way
• change eqx query default format to Raw when writing to a File cia -o