init: add source code from src.zip

src/ink/warn.ts

@@ -0,0 +1,9 @@
+import { logForDebugging } from '../utils/debug.js'
+
+export function ifNotInteger(value: number | undefined, name: string): void {
+  if (value === undefined) return
+  if (Number.isInteger(value)) return
+  logForDebugging(`${name} should be an integer, got ${value}`, {
+    level: 'warn',
+  })
+}