Update .gitignore and configure IntelliJ IDEA copyright settings

.gitignore

@@ -8,7 +8,6 @@
 steamwar.properties
 
 # IntelliJ IDEA
-.idea
 *.iml
 
 # VSCode

.idea/.gitignore

@@ -0,0 +1,32 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
+/AndroidProjectSystem.xml
+/checkstyle-idea.xml
+/compiler.xml
+/copilot.data.migration.agent.xml
+/copilot.data.migration.ask.xml
+/copilot.data.migration.ask2agent.xml
+/copilot.data.migration.edit.xml
+/dataSources.xml
+/encodings.xml
+/git_toolbox_blame.xml
+/git_toolbox_prj.xml
+/gradle.xml
+/jarRepositories.xml
+/jpa.xml
+/kotlinc.xml
+/misc.xml
+/modules.xml
+/scala_compiler.xml
+/swagger-settings.xml
+/uiDesigner.xml
+/vcs.xml
+/codeStyles/
+/inspectionProfiles/
+/modules/

.idea/copyright/profiles_settings.xml

@@ -0,0 +1,7 @@
+<component name="CopyrightManager">
+  <settings default="sw">
+    <module2copyright>
+      <element module="All" copyright="sw" />
+    </module2copyright>
+  </settings>
+</component>

.idea/copyright/sw.xml

@@ -0,0 +1,6 @@
+<component name="CopyrightManager">
+  <copyright>
+    <option name="notice" value="  This file is a part of the SteamWar software.&#10;  &#10;  Copyright (C) &amp;#36;today.year SteamWar.de-Serverteam&#10;  &#10;  This program is free software: you can redistribute it and/or modify&#10;  it under the terms of the GNU Affero General Public License as published by&#10;  the Free Software Foundation, either version 3 of the License, or&#10;  (at your option) any later version.&#10;  &#10;  This program is distributed in the hope that it will be useful,&#10;  but WITHOUT ANY WARRANTY; without even the implied warranty of&#10;  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the&#10;  GNU Affero General Public License for more details.&#10;  &#10;  You should have received a copy of the GNU Affero General Public License&#10;  along with this program.  If not, see &lt;https://www.gnu.org/licenses/&gt;." />
+    <option name="myName" value="sw" />
+  </copyright>
+</component>