Add ppafm codes to daint.cscs.ch computer (#25)

daint.cscs.ch/gpu/codes/ppafm.yaml

@@ -0,0 +1,18 @@
+---
+label: '{{ code_name }}'
+description: PPAFM code https://github.com/Probe-Particle/ppafm.git
+default_calc_job_plugin: nanotech_empa.afm
+filepath_executable: /users/cpi/aiida-soft/run_{{ code_name }}.sh
+prepend_text: |
+    export PATH="/users/cpi/miniconda3/bin:$PATH"
+    eval "$(conda shell.posix hook)"
+    econda activate /users/cpi/miniconda3/envs/env-{{ code_name }}
+append_text: ''
+metadata:
+    template_variables:
+        code_name:
+            type: list
+            key_display: Code name
+            options:
+                - ppafm
+                - 2ppafm