feat: Multiplayer (#3)

Reviewed-on: https://gitea.local.jzitnik.dev/jzitnik/game/pulls/3
Co-authored-by: jzitnik-dev <email@jzitnik.dev>
Co-committed-by: jzitnik-dev <email@jzitnik.dev>

.gitignore

@@ -1,42 +1 @@
-target/
-!.mvn/wrapper/maven-wrapper.jar
-!**/src/main/**/target/
-!**/src/test/**/target/
-.kotlin
-
-### IntelliJ IDEA ###
-.idea/modules.xml
-.idea/jarRepositories.xml
-.idea/compiler.xml
-.idea/libraries/
-.idea/FuzzierSettings.xml
-*.iws
-*.iml
-*.ipr
-
-### Eclipse ###
-.apt_generated
-.classpath
-.factorypath
-.project
-.settings
-.springBeans
-.sts4-cache
-
-### NetBeans ###
-/nbproject/private/
-/nbbuild/
-/dist/
-/nbdist/
-/.nb-gradle/
-build/
-!**/src/main/**/build/
-!**/src/test/**/build/
-
-### VS Code ###
-.vscode/
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-### Mac OS ###
-.DS_Store
-
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