Add endpoint to get all collections and PMIDs
Add endpoint to get all collections and PMIDs

neelsomani/brainspell-neo,OpenNeuroLab/brainspell-neo,OpenNeuroLab/brainspell-neo,OpenNeuroLab/brainspell-neo,OpenNeuroLab/brainspell-neo,neelsomani/brainspell-neo,neelsomani/brainspell-neo