Try to improve consistency

- Makes code formatting more consistent with the C++ codebase. Probably removes some trailing whitespace. Maybe it would be best to commit an Eclipse or IntelliJ code format preferences file?
- Removes obscure suppressions. I personally think it's better to only suppress warnings that javac complains about. Suppressing a lot of non-standardised warnings (many of them turned off by default even in IntelliJ) just creates needless clutter.
- Fixes some trivial warnings instead of suppressing them. serialVersionUID is sort of stupid, but I'd rather mentally ignore it or just fix it if it's really that annoying.

Signed-off-by: TheKodeToad <TheKodeToad@proton.me>

libraries/launcher/org/prismlauncher/utils/StringUtils.java

@@ -36,8 +36,8 @@
 
 package org.prismlauncher.utils;
 
-
 public final class StringUtils {
+
     private StringUtils() {
     }
 
@@ -46,6 +46,7 @@ public final class StringUtils {
         if (splitPoint == -1)
             return null;
 
-        return new String[]{ input.substring(0, splitPoint), input.substring(splitPoint + 1) };
+        return new String[] { input.substring(0, splitPoint), input.substring(splitPoint + 1) };
     }
+
 }