Added a MVEL Template Action Kamelet

docs/modules/ROOT/pages/mvel-template-action.adoc

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+// THIS FILE IS AUTOMATICALLY GENERATED: DO NOT EDIT
+= image:kamelets/mvel-template-action.svg[] Mvel Template Action
+
+*Provided by: "Apache Software Foundation"*
+
+*Support Level for this Kamelet is: "Preview"*
+
+Apply a Mvel Template.
+
+The template property needs to be encoded in base64, so when you pass it as parameter, don't forget to encode it.
+
+== Configuration Options
+
+The following table summarizes the configuration options available for the `mvel-template-action` Kamelet:
+[width="100%",cols="2,^2,3,^2,^2,^3",options="header"]
+|===
+| Property| Name| Description| Type| Default| Example
+| *template {empty}* *| Template| The inline template| binary| | 
+|===
+
+NOTE: Fields marked with ({empty}*) are mandatory.
+
+== Usage
+
+This section summarizes how the `mvel-template-action` can be used in various contexts.
+
+=== Knative Action
+
+The `mvel-template-action` Kamelet can be used as intermediate step in a Knative binding.
+
+.mvel-template-action-binding.yaml
+[source,yaml]
+----
+apiVersion: camel.apache.org/v1alpha1
+kind: KameletBinding
+metadata:
+  name: mvel-template-action-binding
+spec:
+  source:
+    ref:
+      kind: Kamelet
+      apiVersion: camel.apache.org/v1alpha1
+      name: timer-source
+    properties:
+      message: "Hello"
+  steps:
+  - ref:
+      kind: Kamelet
+      apiVersion: camel.apache.org/v1alpha1
+      name: mvel-template-action
+    properties:
+      template: "The Template"
+  sink:
+    ref:
+      kind: InMemoryChannel
+      apiVersion: messaging.knative.dev/v1
+      name: mychannel
+
+----
+
+Make sure you have xref:latest@camel-k::installation/installation.adoc[Camel K installed] into the Kubernetes cluster you're connected to.
+
+Save the `mvel-template-action-binding.yaml` file into your hard drive, then configure it according to your needs.
+
+You can run the action using the following command:
+
+[source,shell]
+----
+kubectl apply -f mvel-template-action-binding.yaml
+----
+
+==== *Binding to Knative using the Kamel CLI:*
+
+The procedure described above can be simplified into a single execution of the `kamel bind` command:
+
+[source,shell]
+----
+kamel bind timer-source?message=Hello --step mvel-template-action -p "step-0.template=The Template" channel/mychannel
+----
+
+This will create the KameletBinding under the hood and apply it to the current namespace in the cluster.
+
+=== Kafka Action
+
+The `mvel-template-action` Kamelet can be used as intermediate step in a Kafka binding.
+
+.mvel-template-action-binding.yaml
+[source,yaml]
+----
+apiVersion: camel.apache.org/v1alpha1
+kind: KameletBinding
+metadata:
+  name: mvel-template-action-binding
+spec:
+  source:
+    ref:
+      kind: Kamelet
+      apiVersion: camel.apache.org/v1alpha1
+      name: timer-source
+    properties:
+      message: "Hello"
+  steps:
+  - ref:
+      kind: Kamelet
+      apiVersion: camel.apache.org/v1alpha1
+      name: mvel-template-action
+    properties:
+      template: "The Template"
+  sink:
+    ref:
+      kind: KafkaTopic
+      apiVersion: kafka.strimzi.io/v1beta1
+      name: my-topic
+
+----
+
+Ensure that you've installed https://strimzi.io/[Strimzi] and created a topic named `my-topic` in the current namespace.
+Make also sure you have xref:latest@camel-k::installation/installation.adoc[Camel K installed] into the Kubernetes cluster you're connected to.
+
+Save the `mvel-template-action-binding.yaml` file into your hard drive, then configure it according to your needs.
+
+You can run the action using the following command:
+
+[source,shell]
+----
+kubectl apply -f mvel-template-action-binding.yaml
+----
+
+==== *Binding to Kafka using the Kamel CLI:*
+
+The procedure described above can be simplified into a single execution of the `kamel bind` command:
+
+[source,shell]
+----
+kamel bind timer-source?message=Hello --step mvel-template-action -p "step-0.template=The Template" kafka.strimzi.io/v1beta1:KafkaTopic:my-topic
+----
+
+This will create the KameletBinding under the hood and apply it to the current namespace in the cluster.
+
+// THIS FILE IS AUTOMATICALLY GENERATED: DO NOT EDIT