Documentation E2E POC Section (Code First and Contrct First) (#1368)

* test gitignore fork

* HowTO cobigen E2E - Code First

* HowTO cobigen E2E - Code First + Contract First

* HowTO cobigen E2E - Code First + Contract First

* HowTO cobigen E2E - Code First + Contract First

* HowTO cobigen E2E - Code First + Contract First

* HowTO cobigen E2E - Code First + Contract First

* HowTO cobigen E2E - Code First + Contract First

* HowTO cobigen E2E - Code First + Contract First

* HowTO cobigen E2E - Code First + Contract First

Co-authored-by: scerroni <stefano.cerroni@capgemini.com>
Co-authored-by: SchettlerKoehler <62466958+SchettlerKoehler@users.noreply.github.com>

.gitignore

@@ -30,3 +30,7 @@ cobigen-eclipse/cobigen-eclipse-test/screenshots
 .pydevproject
 objectdb
 .mypy_cache
+
+#Intellij
+.idea
+*.iml

documentation/_Sidebar.asciidoc

@@ -14,6 +14,7 @@
 * link:howto_create-external-plugin.asciidoc[External plugin creation]
 * link:howto-devonfw-ide-CobiGen-PoC-E2E.asciidoc[End to End POC Code generation using Entity class]
 * link:howto-devonfw-CobiGen-OpenAPI.asciidoc[End to End POC Code generation using OpenAPI]
+* link:howto-devonfw-adapt_template.asciidoc[Adapt Template from Cobigen]
 
 === Configuration
 * link:cobigen-core_configuration[CobiGen Configuration]

documentation/howto-devonfw-adapt_template.asciidoc

@@ -0,0 +1,38 @@
+:doctype: book
+:toc:
+toc::[]
+= Adapt Templates from Cobigen
+
+== Adapt CobiGen_Templates
+
+After following this tutorial, you will have the CobiGen_Templates downloaded on your local machine. To import these templates you need to do the following:
+
+Right click in any part of the package explorer, then click on CobiGen -> Adapt templates
+
+image:images/howtos/e2e_gen/image56.png[]
+
+Click _Ok_:
+
+image:images/howtos/e2e_gen/image57.png[]
+
+Now the CobiGen_Templates project will be automatically imported into your workspace, as shown on the image below:
+
+image:images/howtos/e2e_gen/image58.png[]
+
+image:images/howtos/e2e_gen/image59.png[]
+
+Now you just need to change the Java version of the project to JRE 1.8. Right click on the JRE system library, and then on _Properties:_
+
+image:images/howtos/e2e_gen/image60.png[]
+
+Now change the version to Java 1.8
+image:images/howtos/e2e_gen/image61.png[]
+
+Now you have successfully imported the CobiGen templates. If you want to edit them, you will find them in the folder _src/main/templates._ For instance, the Java templates are located here:
+
+image:images/howtos/e2e_gen/image62.png[]
+
+Now you can adapt the templates as much as you want. Documentation about this can be found on:
+
+[source, URL]
+https://github.com/devonfw/tools-cobigen/wiki/Guide-to-the-Reader