Splits vectors and intersections into new packages

esbuild isn't currently tree shaking intersections, but that's a file where we could save some room

packages/vec/scripts/pre-dev.js

@@ -0,0 +1,27 @@
+/* eslint-disable */
+const fs = require('fs')
+const esbuild = require('esbuild')
+
+async function main() {
+  if (fs.existsSync('./dist')) {
+    fs.rmSync('./dist', { recursive: true }, (e) => {
+      if (e) {
+        throw e
+      }
+    })
+  }
+
+  esbuild.build({
+    entryPoints: ['./src/index.ts'],
+    outdir: 'dist/cjs',
+    minify: true,
+    bundle: true,
+    sourcemap: true,
+    format: 'cjs',
+    target: 'es6',
+    tsconfig: './tsconfig.json',
+    external: ['react', 'react-dom'],
+  })
+}
+
+main()