Join both display function and display fetish or attraction if fetish is
empty.

Replace initNationalities passage with JS, and remove hardcoded nationality sets from it (use the vanilla presets instead).

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.

We no have JS scripts not only in src/js but everywhere in src/

A simple test by nodejs that can be put inside the Git pre-commit hook
that checks for basic syntax violations.

The classes are used only to set up data scheme, thus they need no JS
implementation.

The MSBbuild is on par with the Makefile: it locates Git, inserts commit
tag, resets the file (all is done if git is found).

VSCode and typescript still do not understand assignments to window as
introducing of a global name. To make them happy, use assignment to
globalThis.