Quality of life update & package migrations. Use Vercel as default adapter (#67)

* Update all packages
* Manual migration to SkeletonUI v4.8.0. Event elements has breaking tabs underline highlight
* Remove unused dependencies & Let Prettier clean everything
* Minor misc styling update

src/app.d.ts

@@ -1,13 +1,13 @@
 // See https://svelte.dev/docs/kit/types#app.d.ts
 // for information about these interfaces
 declare global {
-    namespace App {
-        // interface Error {}
-        // interface Locals {}
-        // interface PageData {}
-        // interface PageState {}
-        // interface Platform {}
-    }
+	namespace App {
+		// interface Error {}
+		// interface Locals {}
+		// interface PageData {}
+		// interface PageState {}
+		// interface Platform {}
+	}
 }
 
 export {};