[Enhancement]: Provide popular aliases for common Templates

[johnstonmatt]

Version

cndi v2.25.2
kubeseal v0.26.0
terraform v1.5.5

Please provide a summary of the enhancement you are proposing:

Users may struggle to find Templates like cnpg if they are expecting to see postgres or postgresql, if these are passed in explicitly, they should effectively redirect.

Please provide the motivation or use case for this enhancement:

Noticed that https://cndi.dev/templates/postgres is a particularly bad example of this issue

How can we best workaround this issue so far?

No response

How would you approach solving this problem within CNDI?

I hope we can simply add aliases to the directory section of ./src/constants.ts, while we're in the neighborhood we should also break the registry out into it's own file, possibly as a data file rather than source code.

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