tsconfig.json has now been split into two files:


tsconfig.json, which handles basic type checking for src/ink/js/

   and src/stories/.


tsconfig.build.json, which handles the actual build process for

d.ts files, limited to src/ink/js/.


When we run tsc to generate the type file, we limit this to

tsconfig.build.json. This ensures we only generate types for Ink, and

not for any story files or anything in node_modules.

Successfully built the TypeScript codebase, and verified it was limited

to Ink code.
Verified that type checking still worked in story files.