add BEAUti exec:exec and move fxtemplates to JPMS-safe path

Move fxtemplates to beast.morph.models.fx/fxtemplates/ to avoid
JPMS split-package conflict with beast-fx. Add exec-maven-plugin
to beast-morph-models-fx for running BEAUti with morph-models on
the module path. Add beast.main and beast.args default properties.

Author: alexeid

beast-morph-models-fx/pom.xml

@@ -41,6 +41,20 @@
 
     <build>
         <plugins>
+            <!-- Run BEAUti with morph-models on module path:
+                 mvn -pl beast-morph-models-fx exec:exec
+                 mvn -pl beast-morph-models-fx exec:exec -Dbeast.main=beast.base.minimal.BeastMain -Dbeast.args="examples/M3982.xml" -->
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>exec-maven-plugin</artifactId>
+                <version>3.5.0</version>
+                <configuration>
+                    <executable>java</executable>
+                    <workingDirectory>${maven.multiModuleProjectDirectory}</workingDirectory>
+                    <commandlineArgs>--module-path %classpath -m beast.fx/${beast.main} ${beast.args}</commandlineArgs>
+                </configuration>
+            </plugin>
+
             <!-- Assemble BEAST package ZIP -->
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>

beast-morph-models-fx/src/assembly/beast-package.xml

@@ -31,7 +31,7 @@
     <fileSets>
         <!-- fxtemplates/ -->
         <fileSet>
-            <directory>${project.basedir}/src/main/resources/fxtemplates</directory>
+            <directory>${project.basedir}/src/main/resources/beast.morph.models.fx/fxtemplates</directory>
             <outputDirectory>/fxtemplates</outputDirectory>
         </fileSet>
         <!-- examples/ from project root (excluding legacy directories) -->

…n/resources/fxtemplates/morph-models.xml …h.models.fx/fxtemplates/morph-models.xmlbeast-morph-models-fx/src/main/resources/fxtemplates/morph-models.xml renamed to beast-morph-models-fx/src/main/resources/beast.morph.models.fx/fxtemplates/morph-models.xml beast-morph-models-fx/src/main/resources/fxtemplates/morph-models.xml renamed to beast-morph-models-fx/src/main/resources/beast.morph.models.fx/fxtemplates/morph-models.xml

@@ -47,6 +47,8 @@
         <beast.version>2.8.0-SNAPSHOT</beast.version>
         <javafx.version>25.0.2</javafx.version>
         <junit.version>5.8.2</junit.version>
+        <beast.main>beastfx.app.beauti.Beauti</beast.main>
+        <beast.args/>
         <beast.pkg.name>MM</beast.pkg.name>
         <beast.pkg.version>1.3.0</beast.pkg.version>
     </properties>