add software support m6 docs

docs/merlin6/software-support/paraview.md

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+# ParaView
+
+!!! note
+    **[NoMachine](../how-to-use-merlin/nomachine.md)** is the official
+    **strongly recommended and supported** tool for running *ParaView*.
+    Consider that running over SSH (X11-Forwarding needed) is very slow, but
+    also configuration might not work as it also depends on the client
+    configuration (Linux workstation/laptop, Windows with XMing, etc.). Hence,
+    please **avoid running Paraview over SSH**.  The only exception for running
+    over SSH is when running it as a job from a NoMachine client.
+
+## Usage
+
+### PModules
+
+Is strongly recommended the use of the latest ParaView version available in
+PModules. In example, for loading **paraview**:
+
+```bash
+module use unstable
+module load paraview/5.8.1
+```
+
+### Running ParaView
+
+For running ParaView, one can run it with **VirtualGL** to take advantatge of
+the GPU card located on each login node. For that, once loaded, you can start
+**paraview** as follows:
+
+```bash
+vglrun paraview
+```
+
+Alternatively, one can run **paraview** with *mesa* support with the below
+command. This can be useful when running on CPU computing nodes (with `srun` /
+`salloc`) which have no graphics card (and where `vglrun` is not possible):
+
+```bash
+paraview-mesa paraview
+```
+
+#### Running older versions of ParaView
+
+Older versions of ParaView available in PModules (i.e. `paraview/5.0.1` and
+`paraview/5.4.1`) might require a different command for running paraview with
+**Mesa** support. The command is the following:
+
+```bash
+# Warning: only for Paraview 5.4.1 and older
+paraview --mesa
+```
+
+#### Running ParaView interactively in the batch system
+
+One can run ParaView interactively in the CPU cluster as follows:
+
+```bash
+# First, load module. In example: "module load paraview/5.8.1"
+srun --pty --x11 --partition=general --ntasks=1 paraview-mesa paraview
+```
+
+One can change the partition, number of tasks or specify extra parameters to
+`srun` if needed.