Add partial test for walking up context vs parameters

js/test_cases/partial_simple/README.md

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+Partial parameters do not take highest priority but also do not seem to take lowest priority. Current theory is parameters are inserted 1 level above the current context (so parameters would be references before walking up).

js/test_cases/partial_simple/input2.json

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+{"people": [
+  {"name": "Alice"},
+  {"name": "Bob"}
+],
+ "item": "cat"}