Fix license headers

- Update license headers in several files to remove multimc apache reference, when unneeded
  - LauncherFactory: we've entirely rewritten this class at this point, so it's fully under GPL code
  - Launcher: this interface contains zero logic, and only a single method named `launch`, so I doubt you can actually copyright that
  - LauncherProvider: same as above
  - ParseException, ParameterNotFoundException: same as above; this class contains almost no logic (And the logic that was added is under GPL)
  - ReflectionUtils, StringUtils: add license header
  - Everything else: modify the program name in the license header from "PolyMC - Minecraft Launcher" to "Prism Launcher"

Signed-off-by: solonovamax <solonovamax@12oclockpoint.com>

libraries/launcher/net/minecraft/Launcher.java

@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-3.0-only
 /*
- *  PolyMC - Minecraft Launcher
+ *  Prism Launcher
+ *
  *  Copyright (C) 2022 icelimetea <fr3shtea@outlook.com>
  *  Copyright (C) 2022 TheKodeToad <TheKodeToad@proton.me>
  *  Copyright (C) 2022 solonovamax <solonovamax@12oclockpoint.com>