Improve robustness of art asset lookup

See merge request !6893

Improve robustness of art asset lookup...if an asset is not found, issue a console error and move on instead of crashing hard.

MinorFixes

See merge request !6892

saRules and TODO cleanup

See merge request !6889

Rework diplomacy page

See merge request !6886

Port most of neighborInteract.tw to DOM so it can be rebuilt dynamically when changing the selected arcology on the grid or list, and get rid of the old arcology link list entirely.
Refactor economic uncertainty calculation into a shared function and eliminate the economicUncertainty global variable.
Allow Neighbor Description to be called on your own arcology, because why not?

Split out container mode and render the cells a few different ways, since we want to avoid a dependency on direction.

Fix co-existance of TypeScript and JavaScript declarations

See merge request !6887

Fix text wrapping for slave summary paragraphs

See merge request !6888

Replace CSS margin with explicit whitespace to allow line wrap between
consequent spans used in the abbreviated mode.

Contributes to #1823.

Rename the FC.d.ts to FC.ts to move it from the ambient to normal
context, thus making namespace declarations from the FC.ts to extend but
not overwrite "namespace" declarations from .js files in the TypeScript
AST.

Fixes

See merge request !6885

Commas and whitespace

See merge request !6884

Add eslint rule to warn about the comma operator.

See merge request !6883

Add eslint rule to warn about the comma operator.  Comma operators in our code are almost always mistakes stemming from bad or incomplete SC conversion.