Fix various build issues (#1942)

* remove dynamic import for platform features

* increase node memory limit on macOS build

* fix invalid dynamic imports in renderer

* remove discord-rpc import in renderer

src/main/features/index.ts

@@ -1,2 +1,9 @@
 import './core';
-import(`./${process.platform}`);
+
+if (process.platform === 'linux') {
+    import('./linux');
+} else if (process.platform === 'darwin') {
+    import('./darwin');
+} else if (process.platform === 'win32') {
+    import('./win32');
+}

src/main/features/win32/index.ts

@@ -0,0 +1 @@
+export {};