feat: add support for setting target source set

[monosoul]

This PR introduces support for setting target source set for each GenerateJooqClassesTask instance.

Source sets are configured right after the plugin is applied, but before the build script (project) is evaluated, so source set configuration happens before any values are set in the buildscript. This means a project extension can't be used to configure the source set name for the plugin to generate sources for (the source set will be configured before targetSourceSet value is set). Therefore I took a different approach here: we configure all source sets to include GenerateJooqClassesTask tasks output where targetSourceSet value of the task matches the source set name.

This way it is possible to avoid using something like project.afterEvaluate to configure source sets and configuration still happens lazily.

Fixes #213

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.34%. Comparing base (58f4d40) to head (597cd6b).

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #214      +/-   ##
============================================
+ Coverage     97.32%   97.34%   +0.01%     
- Complexity      141      142       +1     
============================================
  Files            27       27              
  Lines           598      602       +4     
  Branches         24       24              
============================================
+ Hits            582      586       +4     
  Misses            5        5              
  Partials         11       11              

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[github-actions]

To use the snapshot version of the plugin add this to settings.gradle.kts:

pluginManagement {
  repositories {
    maven {
      name = "JooqDockerPluginSnapshotRepo"
      url = uri("https://maven.pkg.github.com/monosoul/jooq-gradle-plugin/")
      credentials {
        username = "<your GitHub username>"
        password = "<your GitHub access token with read:packages scope>"
      }
    }
    gradlePluginPortal()
  }
}

And this to build.gradle.kts:

plugins {
  id("dev.monosoul.jooq-docker") version "SNAPSHOT-58e6ce866ec07fda84268bcbf657b8428e137cd6"
}