Resolve intl version conflict for Flutter 3.32

[masa-tokyo]

Hi, team.
Thanks for the great package.

After upgrading the Flutter SDK in my project to 3.32, I bumped into the version conflict:

Note: intl is pinned to version 0.20.2 by flutter_localizations from the flutter SDK.
See https://dart.dev/go/sdk-version-pinning for details.


Because arb_translate >=0.0.2 depends on intl ^0.19.0 and every version of flutter_localizations from sdk depends on intl 0.20.2, arb_translate >=0.0.2 is incompatible with flutter_localizations from sdk.
So, because base_ui depends on both flutter_localizations from sdk and arb_translate ^1.1.0, version solving failed.
Failed to update packages.
exit code 1

To resolve this, I changed the intl version to any to be more flexible.

[masa-tokyo]

Currently, it seems you need the models implemented in #24 for things to work.