Configuration cache support

[fprochazka]

Hi, I've tried using the plugin with a project with the configuration cache enabled, and it failed. Not sure why. To be precise, I had it in a project, which I then included into another project with includeBuild()

Configuration cache problems found in this build.

* Exception is:
org.gradle.internal.cc.impl.ConfigurationCacheProblemsException: Configuration cache problems found in this build.

6 problems were found storing the configuration cache, 1 of which seem unique.
- Task `:framefork-typed-ids:typed-ids:generatePackageInfo` of type `io.github.joselion.strictnullcheck.lib.GeneratePackageInfoTask`: cannot serialize object of type 'org.gradle.api.internal.project.DefaultProject', a subtype of 'org.gradle.api.Project', as these are not supported with the configuration cache.
  See https://docs.gradle.org/8.10/userguide/configuration_cache.html#config_cache:requirements:disallowed_types

See the complete report at file:///.../configuration-cache-report.html

BUILD FAILED in 2s
125 actionable tasks: 2 executed, 123 up-to-date
Configuration cache entry discarded with 6 problems.

The report showed the following