build: remove source features deprecated in tycho 5

Author: sebthom

org.eclipse.tm4e.repository/category.xml

@@ -3,18 +3,12 @@
    <feature id="org.eclipse.tm4e.feature">
       <category name="TextMate"/>
    </feature>
-   <feature id="org.eclipse.tm4e.feature.source">
-      <category name="Sources"/>
-   </feature>
    <feature id="org.eclipse.tm4e.language_pack.feature">
       <category name="TextMate"/>
    </feature>
    <bundle id="org.eclipse.tm4e.samples" version="0.0.0">
       <category name="Samples"/>
    </bundle>
-   <bundle id="org.eclipse.tm4e.samples.source" version="0.0.0">
-      <category name="Sources"/>
-   </bundle>
    <bundle id="com.google.gson" version="0.0.0">
       <category name="Dependencies"/>
    </bundle>
@@ -38,6 +32,5 @@
    </bundle>
    <category-def name="TextMate" label="TextMate"/>
    <category-def name="Samples" label="Samples"/>
-   <category-def name="Sources" label="Sources"/>
    <category-def name="Dependencies" label="Dependencies"/>
 </site>

org.eclipse.tm4e.repository/pom.xml

@@ -15,6 +15,21 @@
 		<maven.deploy.skip>true</maven.deploy.skip>
 	</properties>
 
+	<build>
+		<plugins>
+			<plugin>
+				<!-- https://tycho.eclipseprojects.io/doc/main/tycho-p2-repository-plugin/plugin-info.html -->
+				<groupId>org.eclipse.tycho</groupId>
+				<artifactId>tycho-p2-repository-plugin</artifactId>
+				<version>${tycho-version}</version>
+				<configuration>
+					<!-- see https://github.com/eclipse-tycho/tycho/discussions/5265#discussioncomment-14262476 -->
+					<includeAllSources>true</includeAllSources>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+
 	<profiles>
 		<profile>
 			<id>sign</id>

pom.xml

@@ -200,13 +200,6 @@
 				<artifactId>tycho-source-plugin</artifactId>
 				<version>${tycho-version}</version>
 				<executions>
-					<execution>
-						<id>feature-source</id>
-						<phase>package</phase>
-						<goals>
-							<goal>feature-source</goal>
-						</goals>
-					</execution>
 					<execution>
 						<id>plugin-source</id>
 						<goals>