Carry over field positions to display helpful errors #178

Job	Run time
Build Catala and generate CI Docker image	5m 37s
Run integrated tests	14m 23s
Build and test the language server	6m 35s
Build catala-examples and generate artifacts	12m 15s
Build Catala on Windows	0s
Publish static content to github-pages	0s
	38m 50s

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