fix: add SLF4J NOP binding to target, clean up stale imports

Add slf4j.nop 1.7.36 from Eclipse Orbit aggregation 4.39.0 to the DDK
target platform, providing the SLF4J 1.7.x StaticLoggerBinder that
Xtext's transitive slf4j.api bundle looks for at runtime. This silences
the "Failed to load class org.slf4j.impl.StaticLoggerBinder" warning.

Remove unused Import-Package: org.slf4j from three test bundle manifests
where no source file references org.slf4j:
- com.avaloq.tools.ddk.check.ui.test
- com.avaloq.tools.ddk.xtext.test
- com.avaloq.tools.ddk.xtext.test.core

Retains org.slf4j in com.avaloq.tools.ddk.test.ui — its SwtBot wrapper
classes directly use org.slf4j.Logger.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: joaodinissf

com.avaloq.tools.ddk.check.ui.test/META-INF/MANIFEST.MF

@@ -29,8 +29,7 @@ Require-Bundle: com.avaloq.tools.ddk.check.ui,
 Export-Package: com.avaloq.tools.ddk.check.ui.test,
  com.avaloq.tools.ddk.check.ui.test.util,
  com.avaloq.tools.ddk.check
-Import-Package: org.slf4j,
- org.hamcrest.core,
+Import-Package: org.hamcrest.core,
  org.junit.runner;version="4.5.0",
  org.junit.runner.manipulation;version="4.5.0",
  org.junit.runner.notification;version="4.5.0",

com.avaloq.tools.ddk.xtext.test.core/META-INF/MANIFEST.MF

@@ -26,7 +26,7 @@ Require-Bundle: com.avaloq.tools.ddk.xtext,
  org.eclipse.emf.common,
  com.avaloq.tools.ddk,
  junit-jupiter-api
-Import-Package: org.slf4j, org.apache.logging.log4j
+Import-Package: org.apache.logging.log4j
 Export-Package: com.avaloq.tools.ddk.xtext.test,
  com.avaloq.tools.ddk.xtext.test.contentassist,
  com.avaloq.tools.ddk.xtext.test.conversion,

com.avaloq.tools.ddk.xtext.test/META-INF/MANIFEST.MF

@@ -46,8 +46,7 @@ Import-Package: com.avaloq.tools.ddk.check.runtime.test.core,
  com.avaloq.tools.ddk.xtext.test.export,
  com.avaloq.tools.ddk.xtext.test.format,
  com.avaloq.tools.ddk.xtext.ui.test,
- org.apache.logging.log4j,
- org.slf4j
+ org.apache.logging.log4j
 Export-Package: com.avaloq.tools.ddk.xtext,
  com.avaloq.tools.ddk.xtext.formatter,
  com.avaloq.tools.ddk.xtext.formatter.services,

ddk-target/ddk.target

@@ -57,7 +57,8 @@
     <unit id="org.apache.commons.lang3" version="3.20.0"/>
     <unit id="org.apache.logging.log4j.core" version="2.25.3"/>
     <unit id="org.apache.logging.log4j.api" version="2.25.3"/>
-    <unit id="org.apache.log4j" version="1.2.26"/> <!--use reload4j 1.2.26 for org.eclipse.xtext dependencies to log4j--> 
+    <unit id="org.apache.log4j" version="1.2.26"/> <!--use reload4j 1.2.26 for org.eclipse.xtext dependencies to log4j-->
+    <unit id="slf4j.nop" version="1.7.36"/>
   </location>
   <location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
     <repository location="https://download.eclipse.org/tools/orbit/simrel/maven-osgi/release/4.39.0"/>