Feature Request: configurable `defaultOutputDir` instead of hardcoded `bin`

Feature Request

Please provide a configuration to change defaultOutputDir bin

Detail

I'm not an eclipse user, as I know, bin is widely used as a dir that stores shell scripts, but vscode java plugin uses it as the default output dir, and can not be changed by configuration, the only way I know is using gradle eclipse plugin to generate .classpath with modified config by groovy script in build.gradle, see #634

buildDir = "build/gradle"
apply plugin: 'java'
apply plugin: 'eclipse'
eclipse {
  classpath {
    defaultOutputDir = file('build/eclipse')
    file.whenMerged {
      entries.each { entry ->
        if (entry.kind == 'src' && entry.hasProperty('output')) {
          entry.output = entry.output.replace('bin/', "build/eclipse/")
        }
      }
    }
  }
}

@jdneo https://github.com/redhat-developer/vscode-java/issues/2801#issuecomment-1318256946

You can vote for https://github.com/redhat-developer/vscode-java/issues/1615 to help us prioritize.

If anyone encounter this issue, please comment / give 👍 / link related issue to this one, to help the team escalate the priority of this issue.

The issue names no source files, tests, or entry points; begin by locating the code that sets the Java extension's hardcoded bin default and review existing configuration handling. Done means users can configure defaultOutputDir without the Gradle workaround, with coverage for the configured output path.