Add a property mapped to `org.eclipse.jdt.core.compiler.problem.tasks` to suppress TODO diagnostics

[linghengqian]

• I expect the current extension to add a property to .vscode/settings.json that maps to org.eclipse.jdt.core.compiler.problem.tasks in settings.prefs, to suppress TODO diagnostics. I'm referring to issues like those shown in the image.
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• Currently, setting org.eclipse.jdt.core.compiler.problem.tasks requires developers to manually create a settings.prefs file with 505 lines, which is far too long. I'm referring to the situations mentioned in https://github.com/redhat-developer/vscode-java/wiki/Settings-Global-Preferences and Unable to suppress TODO diagnostics using java.errors.reportTodoComments or java.errors.suppressedDiagnostics #4196 .
• I'm not sure if I've missed any known enhancement issues, such as whether there's an issue that mentions grouping known issues to suppress different groups of issues, like in IntelliJ IDEA?