introduce solid.js

tsconfig.json

@@ -9,9 +9,15 @@
     "sourceMap": true,
     "baseUrl": ".",
     "outDir": "dist",
+
     "strict": true,
     "noFallthroughCasesInSwitch": true,
     "noImplicitReturns": true,
+
+    "jsx": "preserve", // Do not let TS compile JSX; let Vite/Babel do it
+    "jsxImportSource": "solid-js", // Use Solid's types
+
+
     "moduleResolution": "node",
     "resolveJsonModule": true
   }