hotfix(builder): add preset length validation

[mjlescano]

Preset length was not being validated, this causes that when generating the variant for publishing to the registry it can end up being more than 32bytes. Luckily, this fix is not going to break any already published package as the current preset max length published is 24bytes.

This is the original error that was being thrown when trying to pin/publish:

cannon pin ipfs://Qm...
Uploading package data for pinning...
Error: SizeOverflowError: Size cannot exceed 32 bytes. Given size: 36 bytes.

Version: [email protected]
    at FallbackRegistry.getUrl (/Users/**/.nvm/versions/node/v20.10.0/lib/node_modules/@usecannon/cli/node_modules/@usecannon/builder/dist/src/registry.js:147:23)
    at async pinIpfs 

And now, with the fix it doesn't even allow you to build the package:

[mjlescano]

An alpha release was published on v2.21.5-alpha.0