feat: add permission checker

Author: niklasnieberler

plugin-shared/src/main/kotlin/app/simplecloud/plugin/api/shared/permission/PermissionChecker.kt

@@ -0,0 +1,16 @@
+package app.simplecloud.plugin.api.shared.permission
+
+/**
+ * @author Niklas Nieberler
+ */
+
+fun interface PermissionChecker<P> {
+
+    /**
+     * Checks the permission by a player
+     * @param player to check the permission
+     * @param name of the permission
+     */
+    fun checkPermission(player: P, name: String): Boolean
+
+}

plugin-velocity/src/main/kotlin/app/simplecloud/plugin/api/velocity/permission/VelocityPermissionChecker.kt

@@ -0,0 +1,16 @@
+package app.simplecloud.plugin.api.velocity.permission
+
+import app.simplecloud.plugin.api.shared.permission.PermissionChecker
+import com.velocitypowered.api.proxy.Player
+
+/**
+ * @author Niklas Nieberler
+ */
+
+class VelocityPermissionChecker : PermissionChecker<Player> {
+
+    override fun checkPermission(player: Player, name: String): Boolean {
+        return player.hasPermission(name)
+    }
+
+}