Refactor Star Wars Journal module structure and styles

- Replaced `main.js` with `asc-starwars.js` and modularized journal sheet logic into `journalSheets.js`.
- Updated `module.json` to use ES modules and adjusted script/style references accordingly.
- Consolidated and enhanced CSS styles into `asc-starwars-journal.css` and added `asc-ffg-starwars.css`.
- Removed deprecated `starwars-journal.css` and outdated journal sheet registration logic.

src/scripts/asc-starwars.js

@@ -0,0 +1,11 @@
+import {StarWarsStyleJournalSheet} from "./journalSheets.js"
+// ui.notifications.info
+// Register the custom journal sheet
+
+Hooks.once('ready', () => {
+  console.log('ASC Star Wars Style Journal | Registering custom sheet...');
+  Journal.registerSheet('asc-starwars-style-journal', StarWarsStyleJournalSheet, {
+    label: 'Star Wars Style Journal',
+    makeDefault: false // Set to true if you want this as the default
+  });
+});