add sample categorisation idea - closes #37

_data/funding/oscars-ideas.yml

@@ -18,6 +18,8 @@
 
 - proposal-title: Record provenance information
 
+- proposal-title: Create a controlled vocabulary for the top level classification of sample types
+
 - proposal-title: Instrument PIDs
 
 - proposal-title: Extend <a href='https://pan-training.eu/materials/nexus-nuclear-elastic-x-ray-scattering-universal-software'>Nexus software</a>