Upgrade to Gradle 8.8 and cleanup build

[timyates]

This PR upgrades Gradle to 8.8 and performs some cleanup, namely:

1. Removes unused configurations
2. Follows current best practices to depend on the web-ui yarnBuild output
3. Fixes the publication task (I think)... At least ./gradlew publishToMavenLocal seems correct now 🤔
4. Simplifies the main build file by removing subproject configuration
5. Removes the idea plugin which I don't believe is required any more (as import works)
6. The sonar plugin didn't support Gradle 8, so this PR updates it to latest, and configures it to work.

Running the sonar plugin to test it

• Run sonar locally with docker run -d --name sonarqube -p 9000:9000 sonarqube then visit localhost:9000
• When it's running log in as an admin (with admin/admin) and then change your password as requested
• Create a local project and give it a name and a key check-ins
• On the next screen, select "Use the global setting" and click "Create project"
• Select "Locally" for the analysis method
• Click "Generate" to create a token, then click "continue"
• Select "gradle", copy the command, and run it locally in a terminal window

Closes #2461

[timyates]

Moving back to draft as I think I have broken sonarqube

Fixed... Not sure it was me, but it works again now

[mkimberlin]

Could I con you into adding something to the docs site for this?

[mkimberlin]

The real test will be when the publish github actions workflow gets run. 👀

[timyates]

The real test will be when the publish github actions workflow gets run. 👀

I don't think it was working before 😬 The 0.7.0 jar file just contains a MANIFEST.MF and nothing else 😢

https://github.com/objectcomputing/check-ins/packages/275981

[timyates]

@mkimberlin Docs added! Checked locally, and they look ok when rendered 😎

[mkimberlin]

The real test will be when the publish github actions workflow gets run. 👀

I don't think it was working before 😬 The 0.7.0 jar file just contains a MANIFEST.MF and nothing else 😢

https://github.com/objectcomputing/check-ins/packages/275981

🤣 oops.

[vhscom]

Docs were very helpful for getting SonarQube set-up locally.