Fix index field name for debugging

Cleanup: Rename function, add comments

Cleanup: Remove incorrect comment

Add a slightly more complicated test

Fix incorrect descruction of output variables

Fix broken test because of stupid mistake

Add TODO comment

Add a new (failing) test and some comments

Add name to variable outputs from functions

Add TODO comment

Fix infinite loop

Fixes for network traversal, add comments

Cleanup: Make construction of function fields easier to read

Merge branch 'temp-geometry-nodes-fields' into temp-geometry-nodes-fields--fields

Merge branch 'master' into temp-geometry-nodes-fields

Refactor procedure building to add proper destructs, to use stacks

This still doesn't really work, but it solves a fundamental problem
with the order I was adding destruct calls for intermediate values.
The current problem is that the variables that a function depends
on (its inputs) are not added first, so basically a problem with the
traversal of the field network.

show procedure parameters in dot graph

move dot graph generation into utility class

slightly improve readability of dot export

Cleanup: Rename variables