https://liquidjs.com/tutorials/parse-parameters.html#Parse-Parameters-as-Values
https://liquidjs.com/tutorials/parse-parameters.html#Parse-Key-Value-Pairs-as-Named-Parameters

Currently implementation predated those features and is using a one-off parser using moo: https://github.com/11ty/eleventy/blob/0f44f756a30247515033945e74e171a293bc75d5/src/Engines/Liquid.js

I think due to the size of this change, we’ll probably want a configuration escape hatch for folks to swap back to the old parameter parser

Excellent prior art #1263 #1733