Add full subcommand support in the RBTools command docs extension.
Review Request #12190 — Created March 21, 2022 and submitted
This introduces new directives for RBTools documentation that deals with
multi-commands:
rbt-subcommand
rbt-subcommand-usage
rbt-subcommand-options
This works just like the normal command equivalents, but are used to
document subcommands within a command.
Where possible, most of the code is shared between the command and
subcommand versions.
Upcoming changes will begin making use of these new directives.
Built new docs using these commands. Verified that the results were
correct, sections were in the right place (for both commands and
subcommands), and that references were all correct.