Reformat the templates for Kotlin model code

- Change import statements to not have an indent. No functional change.
- Remove unused imports. These were likely copied over from the Java template, but are not needed in Kotlin.
- Dynamic methods, which generate a map, now use Kotlin's buildMap() instead of mapOf(). mapOf() produces extra garbage, as it creates a Pair for each entry, whereas buildMap() modifies the underlying map directly.
- Static methods are now defined as an expression. No functional change.
- In static methods, the template class name is no longer fully qualified, as it's provided as an import. No functional change.
- Remove semicolons - idiomatic Kotlin doesn't use them. No functional change.

jte-models/src/main/jte/dynamictemplates/kmain.jte

@@ -15,7 +15,7 @@ package ${config.packageName()}
 import gg.jte.TemplateEngine
 import gg.jte.models.runtime.*
 @for(String imp: imports)
-    import ${imp}
+import ${imp}
 @endfor
 
 ${modelConfig.implementationAnnotation()}

jte-models/src/main/jte/dynamictemplates/kmethod.jte

@@ -4,9 +4,13 @@
 @param TemplateDescription template
 
     override fun ${Util.methodName(template)}(${Util.kotlinTypedParams(template, false)}): JteModel {
-        val paramMap = mapOf<String, Any?>(
+        @if(template.params().isEmpty())
+        val paramMap = emptyMap<String, Any?>()
+        @else
+        val paramMap = buildMap<String, Any?> {
         @for(ParamDescription param: template.params())
-            "${param.name()}" to ${param.name()},@endfor
-        )
-        return DynamicJteModel(engine, "${template.name()}", paramMap);
+            put("${param.name()}", ${param.name()})@endfor
+        }
+        @endif
+        return DynamicJteModel(engine, "${template.name()}", paramMap)
     }

jte-models/src/main/jte/statictemplates/kmain.jte

@@ -14,11 +14,9 @@ package ${config.packageName()}
 
 import gg.jte.models.runtime.*
 import gg.jte.ContentType
-import gg.jte.TemplateOutput
-import gg.jte.html.HtmlInterceptor
 import gg.jte.html.HtmlTemplateOutput
 @for(String imp: imports)
-    import ${imp}
+import ${imp}
 @endfor
 
 ${modelConfig.implementationAnnotation()}

jte-models/src/main/jte/statictemplates/kmethod.jte

@@ -6,12 +6,10 @@
 @param TemplateDescription template
 
 !{String outputClass = config.contentType() == ContentType.Html ? "HtmlTemplateOutput" : "TemplateOutput";}
-    override fun ${Util.methodName(template)}(${Util.kotlinTypedParams(template, false)}): JteModel {
-        return StaticJteModel<${outputClass}>(
-            ContentType.${config.contentType()},
-            { output, interceptor -> ${template.fullyQualifiedClassName()}.render(output, interceptor${Util.paramNames(template)}) },
-            "${template.name()}",
-            "${template.packageName()}",
-            ${template.fullyQualifiedClassName()}.JTE_LINE_INFO
-        );
-    }
+    override fun ${Util.methodName(template)}(${Util.kotlinTypedParams(template, false)}): JteModel = StaticJteModel<${outputClass}>(
+        ContentType.${config.contentType()},
+        { output, interceptor -> ${template.className()}.render(output, interceptor${Util.paramNames(template)}) },
+        "${template.name()}",
+        "${template.packageName()}",
+        ${template.className()}.JTE_LINE_INFO
+    )