Implement plexus-build-api

### New feature, improvement proposal

Implementing https://github.com/codehaus-plexus/plexus-build-api helps with IDE integrations like m2e. That way errors are directly emitted at the right context (i.e. file and line where the violation happened) in Eclipse with m2e. For regular CLI invocations nothing changes.

Currently Eclipse just emits a generic error like

```
Failed to execute mojo org.apache.maven.plugins:maven-checkstyle-plugin:3.6.0:check {execution: checkstyle-check} (org.apache.maven.plugins:maven-checkstyle-plugin:3.6.0:check:checkstyle-check:process-sources)

org.eclipse.core.runtime.CoreException: Failed to execute mojo org.apache.maven.plugins:maven-checkstyle-plugin:3.6.0:check {execution: checkstyle-check}
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeMojo(MavenExecutionContext.java:408)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.lambda$2(MavenExecutionContext.java:358)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:462)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:342)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:357)
at org.eclipse.m2e.core.project.configurator.MojoExecutionBuildParticipant.build(MojoExecutionBuildParticipant.java:57)
at org.eclipse.m2e.core.internal.builder.MavenBuilderImpl.lambda$2(MavenBuilderImpl.java:159)
at java.base/java.util.LinkedHashMap.forEach(LinkedHashMap.java:987)
at org.eclipse.m2e.core.internal.builder.MavenBuilderImpl.build(MavenBuilderImpl.java:139)
at org.eclipse.m2e.core.internal.builder.MavenBuilder$1.method(MavenBuilder.java:164)
at org.eclipse.m2e.core.internal.builder.MavenBuilder$1.method(MavenBuilder.java:1)
at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.lambda$1(MavenBuilder.java:109)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:462)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:295)
at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.lambda$0(MavenBuilder.java:100)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:462)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:342)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:281)
at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.execute(MavenBuilder.java:83)
at org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:192)
at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:1109)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:47)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:299)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:355)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:449)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:47)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:452)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:564)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:512)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:594)
at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:208)
at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:309)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
Caused by: org.apache.maven.plugin.MojoFailureException: You have 1 Checkstyle violation.
at org.apache.maven.plugins.checkstyle.CheckstyleViolationCheckMojo.execute(CheckstyleViolationCheckMojo.java:595)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:126)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeMojo(MavenExecutionContext.java:406)
... 32 more
```

This does not even reveal the location of the Checkstyle violation as the actual error is logged before (not part of the MojoFailureException in https://github.com/apache/maven-checkstyle-plugin/blob/dd1abd9ee7cb1046ece3ae013fa6e68a345c7a32/src/main/java/org/apache/maven/plugins/checkstyle/CheckstyleViolationCheckMojo.java#L595).

Start with CheckstyleViolationCheckMojo.java around line 595 and review the proposed plexus-build-api linked in the issue. Trace how the Checkstyle violation is currently emitted before MojoFailureException. Done means m2e can report the violation at its file and line context while regular CLI invocations remain unchanged.

Written by the indexing model from the issue text.