Test maven plugin

[nulls]

Create a simple project on maven and configure maven plugin for diktat with version 2.0.0-rc.8

Todo:

• [x] Add example with multimodules
• [x] Test a single module
• [x] Test multi module
• [x] Test githubActions via -Ddiktat.githubActions=true
• [x] Test two reporters: plain configured via configuration and githubActions configured via environment variable ~(blocked by #1818)~ Test scenario:
  1. Configure reporters:

     <configuration>
     <diktatConfigFile>diktat-analysis.yml</diktatConfigFile>
     <inputs>
     <input>${project.basedir}/src/main/kotlin</input>
     </inputs>
     <reporters>
     <plain/>
     <json>
             <output>${project.built.directory}/some-folder/some-file.json</output>
     </json>
     <checkstyle/>
     </reporters>
     </configuration>

  2. Run diktat check and validate that diktat generates 3 reports: plain to stdout, json to some specific file and checkstyle (xml) to default location target/reports/diktat/diktat.xml
  3. Run diktat check with environment variable githubActions and validate that diktat generates 4 reports: plain to stdout, json to some specific file, checkstyle (xml) to default location target/reports/diktat/diktat.xml and sarif report to default location target/reports/diktat/diktat.sarif
  4. Add configuration for gitHubActions to reporters:

     <reporters>
     <gitHubActions/>
     <plain/>
     <json>
             <output>${project.built.directory}/some-folder/some-file.json</output>
     </json>
     <checkstyle/>
     </reporters>

     And validate that diktat generates 4 reports with and without environment variable githubActions

Found issues:

• [x] #1814

[orchestr7]

We already should have a simple maven project in our repo in examples

[nulls]

How to build snapshot version of plugin: gradlew.bat :diktat-api:publishToMavenLocal :diktat-common:publishToMavenLocal :diktat-rules:publishToMavenLocal :diktat-ktlint-engine:publishToMavenLocal :diktat-runner:publishToMavenLocal :diktat-maven-plugin:publishToMavenLocal

This command builds and uploads a snapshot version to maven local repository. Version is printed in logs:

Reckoned version: 2.0.0-rc.8.113+6211a81