[FEATURE] Enable Pre-registered User-Defined Properties via the TOML Config

[allRisc]

Is this related to a PeakRDL sub-command?
No

Describe the problem/limitation you think should be addressed
It would be convenient to enable registering customer User-Defined Properties Classes (as shown here). This would enable common UDPs to be shared in a local Python package.

Describe the solution you'd like
Create a configuration udp under [peakrdl] section in the configuration TOML. This configuration could be a list of python class types that are added to the rdlc such as below:

[peakrdl]

udp = [
    "my_udp:MyUDPDefinition"
]

Describe alternatives you've considered
Create a custom plugin which includes them under the udp_definitions class variable. However, this doesn't enable them to be shared across all of the various tools to enable direct use when the UDP is not necessary.