Update to JDK 25 support

- Update to JDK 25 support
- Simplify Go build environment by using build constraints native to Go rather than conditional batch file arguments

Save source directory

- Save last selected source directory to config file

Addresses the feature recommended by the following rejected PR:
#3

Drop unneeded import

Fix parsing stream info

- Fixed stream info for audio files with identifiers having parentheses which were not being parsed

Dropped Mac release and added Java 8 release

- To address issues with Macs, the Mac release was dropped entirely, as the Java 8 release will be easier for Mac users to set up.