Adopt org.framefork.build 0.4.0

[fprochazka]

What changed

• Bump org.framefork.build to 0.4.0, resolved from Maven Central (dropped the local mavenLocal() + -SNAPSHOT scaffolding used during pre-release verification).
• Drop root-build boilerplate now provided by the convention plugin: project versioning from gradle.properties, the per-project allDependencies report task, and the Gradle wrapper ALL distribution setting.
• Replace the hand-rolled gradle.projectsEvaluated { mustRunAfter } test-ordering chain with the plugin's default cross-module test serialization. The plugin uses a shared one-permit BuildService, so it enforces mutual exclusion (at most one Test task at a time, everything else stays parallel) rather than a fixed order — immune to the chain breaking when only a subset of module test tasks is run. sequentialTests defaults to true in 0.4.0, so no explicit knob is needed.

Verification

• ./gradlew --refresh-dependencies build against Maven Central — BUILD SUCCESSFUL.
• No mavenLocal() or plugin SNAPSHOT references remain; the only -SNAPSHOT left is the repo's own project version in gradle.properties.

Release notes

• v0.3.0: https://github.com/framefork/framefork-gradle-plugins/releases/tag/v0.3.0
• v0.4.0 (sequentialTests now defaults to true): https://github.com/framefork/framefork-gradle-plugins/releases/tag/v0.4.0