add extra args to git-clone

[gilesknap]

The command ibek support git-clone should support extra args to pass to git so you can do things like --recursive.

This can be achieved in the same way as ibek ioc compile does it here

ibek/src/ibek/support_cmds/commands.py

Lines 252 to 254 in 55417cf

	@support_cli.command(
	context_settings={"allow_extra_args": True, "ignore_unknown_options": True}
	)

ALSO: review all commands to see other places where extra args may be of use and are not currently implemented.

[gilesknap]

@marcelldls a good first issue for you to look at when you want to look at ibek.

[gilesknap]

doh! this this function already supports this:

ibek support git-clone --org https://github.com/epics-containers/ ioc-adsimdetector 2024.3.4b1 --recursive

It passes any extra args to git - but the help fails to mention that - fixing the help