Introducing new step 'gctsDeployCommit' (#1476)

* added new step gctsDeployCommit

* suggested PR fixes applied

* fixed test

* Remove unused imports

Co-authored-by: Christopher Fenner <26137398+CCFenner@users.noreply.github.com>

* added URL encoding for 'request' parameter

* regenerate after change

* minor changes

* renamed step to 'gctsDeploy'

* changed name

* remove space

Co-authored-by: Christopher Fenner <26137398+CCFenner@users.noreply.github.com>

Co-authored-by: Christopher Fenner <26137398+CCFenner@users.noreply.github.com>
Co-authored-by: Oliver Nocon <33484802+OliverNocon@users.noreply.github.com>

documentation/docs/steps/gctsDeployCommit.md

@@ -0,0 +1,41 @@
+# ${docGenStepName}
+
+## ${docGenDescription}
+
+## Prerequisites
+
+With this step you can deploy a commit from a remote Git repository to a local repository on an ABAP server. If no `commit` parameter is specified, this step will pull the latest commit available on the remote repository.
+Learn more about the SAP git-enabled Central Transport Sytem (gCTS) [here](https://help.sap.com/viewer/4a368c163b08418890a406d413933ba7/201909.001/en-US/f319b168e87e42149e25e13c08d002b9.html). With gCTS, ABAP developments on ABAP servers can be maintained in Git repositories.
+
+## ${docGenParameters}
+
+## ${docGenConfiguration}
+
+## ${docJenkinsPluginDependencies}
+
+## Example
+
+Example configuration for the use in a `Jenkinsfile`.
+
+```groovy
+gctsDeploy(
+  script: this,
+  host: "https://abap.server.com:port",
+  client: "000",
+  abapCredentialsId: 'ABAPUserPasswordCredentialsId',
+  repository: "myrepo"
+)
+```
+
+Example for the use in a YAML configuration file (such as `.pipeline/config.yaml`).
+
+```yaml
+steps:
+  <...>
+  gctsDeploy:
+    host: "https://abap.server.com:port"
+    client: "000"
+    username: "ABAPUsername"
+    password: "ABAPPassword"
+    repository: "myrepo"
+```