move UI code into new package

build.js

@@ -1,5 +1,4 @@
 const esbuild = require("esbuild");
-const sveltePlugin = require("esbuild-svelte");
 const path = require("path");
 
 const { version: ignisVersion } = require("./package.json");
@@ -22,20 +21,8 @@ Promise.all([
     logLevel: "info",
   }),
 
-  // Build ignis-ui.js
-  esbuild.build({
-    entryPoints: [path.join(__dirname, "src", "ui", "index.js")],
-    bundle: true,
-    outfile: path.join(__dirname, "dist", "ignis-ui.js"),
-    format: "iife",
-    globalName: "IgnisUI",
-    platform: "browser",
-    target: ["chrome90"],
-    mainFields: ["svelte", "browser", "module", "main"],
-    conditions: ["svelte", "browser"],
-    plugins: [sveltePlugin({ compilerOptions: { css: "injected" } })],
-    logLevel: "info",
-  }),
+  // Build ignis-ui.js (delegated to packages/ui)
+  require("./packages/ui/build.js"),
 
   // Build ignis-bridge plugin
   esbuild.build({