implement the cluster matching algorithm function

* it receives the donations data from the algorithm dispatcher function #11
* it can be an array of donations or a file with the array of donations
* it performs the calculations and save the file to a storage (local or IPFS TBD)
* it returns the url of the file

Start with the algorithm dispatcher function described in issue #11 and determine the expected donations input shape. Clarify the cluster matching calculations and whether storage should be local or IPFS before implementing the function. Done means it accepts an array or donations file, stores the result, and returns its URL.

Written by the indexing model from the issue text.