Add SteamWar CLI module

- add Clikt-based `sw` entrypoint and subcommands
- include database, user, dev, and profiler commands
- wire CLI build and CI install/release steps

CLI/src/Main.kt

@@ -0,0 +1,22 @@
+package de.steamwar
+
+import com.github.ajalt.clikt.core.main
+import com.github.ajalt.clikt.core.subcommands
+import de.steamwar.commands.SteamWar
+import de.steamwar.commands.database.DatabaseCommand
+import de.steamwar.commands.database.InfoCommand
+import de.steamwar.commands.database.ResetCommand
+import de.steamwar.commands.dev.DevCommand
+import de.steamwar.commands.profiler.ProfilerCommand
+import de.steamwar.commands.user.UserCommand
+import de.steamwar.commands.user.UserInfoCommand
+import de.steamwar.commands.user.UserSearchCommand
+
+fun main(args: Array<String>) = SteamWar()
+    .subcommands(
+        DatabaseCommand().subcommands(InfoCommand(), ResetCommand()),
+        UserCommand().subcommands(UserInfoCommand(), UserSearchCommand()),
+        DevCommand(),
+        ProfilerCommand()
+    )
+    .main(args)