Add default copyright to files (#409)

.idea/copyright/Geyser.xml

@@ -0,0 +1,6 @@
+<component name="CopyrightManager">
+  <copyright>
+    <option name="notice" value="Copyright (c) 2019-&amp;#36;today.year GeyserMC. http://geysermc.org&#10; &#10; Permission is hereby granted, free of charge, to any person obtaining a copy&#10; of this software and associated documentation files (the &quot;Software&quot;), to deal&#10; in the Software without restriction, including without limitation the rights&#10; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell&#10; copies of the Software, and to permit persons to whom the Software is&#10; furnished to do so, subject to the following conditions:&#10; &#10; The above copyright notice and this permission notice shall be included in&#10; all copies or substantial portions of the Software.&#10; &#10; THE SOFTWARE IS PROVIDED &quot;AS IS&quot;, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR&#10; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,&#10; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE&#10; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER&#10; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,&#10; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN&#10; THE SOFTWARE.&#10; &#10; @author GeyserMC&#10; @link https://github.com/GeyserMC/Geyser&#10; " />
+    <option name="myName" value="Geyser" />
+  </copyright>
+</component>

.idea/copyright/profiles_settings.xml

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