Add Natvis visualizations for core `indexmap` types#239

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ridwanabdillahi wants to merge 2 commits intoindexmap-rs:masterfrom ridwanabdillahi:natvis

+258-1

Commits on Aug 29, 2022

Add Natvis definitions for IndexMap and IndexSet. Write tests ensuring Natvis definitions do not become stale or break silently.
Ridwan Abdilahi
committed

Commits on Aug 31, 2022

Update test examples to clarify the Natvis representations of IndexSet and IndexMap.
Ridwan Abdilahi
committed