Add taplo/zepter support to the `cmd` bot

[bkontur]

This could be very useful in cases where we want to push a branch from someone else's fork or without needing to check it out locally and install taplo / zepter.

Original idea:

/cmd taplo

/cmd zepter

or just one command for both

/cmd fix-toml

Additional options:
    --package / -p <module> (multi)

TODO

• add to the polkadot-sdk bot
• add to the polkadot-fellows bot

[bkchr]

taplo is already part of fmt:

polkadot-sdk/.github/scripts/cmd/cmd.py

Line 265 in 9be43c0

taplo_status = os.system('taplo format --config .config/taplo.toml')

zepter should be added there as well.

[evilrobot-01]

If useful: tamasfe/taplo#715

[luizhenridev]

MR CREATED - #8252

[bkontur]

MR CREATED - #8252

@luizhenridev thank you for your PR, but as Basti said above, it should be enough to add zepter as a part of fmt bot command and not to add new dedicated command