Updated docs

docs/source/cpl_cli.add.md

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+# cpl add
+
+## Contents
+
+- [Description](#description)
+- [Arguments](#arguments)
+- [Flags](#flags)
+
+Removes a project from workspace.
+
+cpl **add** *&lt;source-project&gt;* *&lt;target-project&gt;* <br>
+cpl **a** *&lt;source-project&gt;* *&lt;target-project&gt;* <br>
+cpl **A** *&lt;source-project&gt;* *&lt;target-project&gt;*
+
+## Description
+
+Adds a project reference to given project.
+
+If you call the command in a CPL workspace, you can use the project names. Otherwise the paths of the projects must be specified.
+
+## Arguments
+
+| Argument               |                        Description                         | Value type |
+|------------------------|:----------------------------------------------------------:|:----------:|
+| ```<source-project>``` | Name of the project to which the reference has to be added | ```str```  |
+| ```<target-project>``` |            Name of the project to be referenced            | ```str```  |
+
+## Flags
+
+| Argument         |                Description                 |
+|------------------|:------------------------------------------:|
+| ```--simulate``` | Specifies whether the command is simulated |