experiment: data inspection via fabricated view queries

[crusso]

Generates one query method per stable variable that has a .view pagination method or shared type.

Hacky but working. Limited to non-nested collections.

Basic demo here https://github.com/crusso/motoko-stable-viewer (requires some setup)

• builds fine locally - no idea why CI
• restore authentication code - disabled for dfx demo
• test
• consider approximating non-shared by shared types, to enable more viewing.
• pagination could use optional count, to show all (remaining) values by default

[github-actions]

Comparing from 33686ba to a841281:
In terms of gas, 1 tests regressed and the mean change is +0.0%.
In terms of size, 1 tests regressed and the mean change is +0.4%.