feat: start custom preferences on backend

frontend/icons.js

@@ -0,0 +1,44 @@
+// This script regenerates the list of icons for the frontend (frontend/src/icons.json)
+// and the backend (backend/icons/icons.go) from the currently installed version of Bootstrap Icons.
+// Run with `pnpm node icons.js` in the frontend directory.
+
+import { writeFileSync } from "fs";
+import icons from "bootstrap-icons/font/bootstrap-icons.json" assert { type: "json" };
+
+const keys = Object.keys(icons);
+
+console.log(`Found ${keys.length} icons`);
+const output = JSON.stringify(keys);
+console.log(`Saving file as src/icons.json`);
+
+writeFileSync("src/icons.json", output);
+
+const goCode1 = `// Generated code. DO NOT EDIT
+package icons
+
+var icons = [...]string{
+`;
+
+const goCode2 = `}
+
+// IsValid returns true if the input is the name of a Bootstrap icon.
+func IsValid(name string) bool {
+	for i := range icons {
+		if icons[i] == name {
+			return true
+		}
+	}
+	return false
+}
+`;
+
+let goOutput = goCode1;
+
+keys.forEach((element) => {
+  goOutput += `	"${element}",\n`;
+});
+
+goOutput += goCode2;
+
+console.log("Writing Go code");
+writeFileSync("../backend/icons/icons.go", goOutput);