Third release

Changes:

• Added simple GUI.
• Switched to Children of the Grave game server.

Fix 1 (untested):

• You can now unlock any champion or map.
• You can now add and remove bots to/from the lobby.

Fix 2 (untested):

• Fixed a crash on Linux when trying to play over a LAN.

Fix 3 (untested):

• Disabled non-working options. Output stderr to the console.

Fix 4 (untested):

• Added an option to download an update from the Skelsoft's repository.
  Warning: If you have modified the game server files, your changes may not be saved.

Fix 5 (untested):

• Used "baseline" Bun-runtime build for older CPUs.

Test 1 (for testers):

• Local network players detection fix.
• Connection via copy-and-paste option.

Important: Unzip the archive before running the executable.