Ensure "project specific" formatter settings are applied

In Eclipse 2023-12 something other than the
`org.eclipse.jdt.core.javaFormatter` setting is need for
"project specific settings". We now also set
`enabling_tag` and `disabling_tag` which seems to be enough
to trigger detection.

Fixes gh-402

Author: philwebb

spring-javaformat-eclipse/io.spring.javaformat.eclipse/src/io/spring/javaformat/eclipse/projectsettings/org.eclipse.jdt.core.prefs

@@ -101,4 +101,6 @@ org.eclipse.jdt.core.compiler.problem.unusedParameterWhenOverridingConcrete=disa
 org.eclipse.jdt.core.compiler.problem.unusedPrivateMember=warning
 org.eclipse.jdt.core.compiler.problem.unusedWarningToken=warning
 org.eclipse.jdt.core.compiler.problem.varargsArgumentNeedCast=warning
+org.eclipse.jdt.core.formatter.disabling_tag=@formatter\:off
+org.eclipse.jdt.core.formatter.enabling_tag=@formatter\:on
 org.eclipse.jdt.core.javaFormatter=io.spring.javaformat.eclipse.formatter.jdk17.tabs