add ImageSharp license

LICENSE.txt

@@ -100,4 +100,53 @@ Permission is hereby granted, free of charge, to any person obtaining a copy of
 
 The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 
-THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
+The dotnet build of MCGalaxy uses ImageSharp for decoding/resizing images, whose license is as follows:
+(source https://github.com/SixLabors/ImageSharp)
+----------------------------------------------------------------------------------
+
+Six Labors Split License
+Version 1.0, June 2022
+Copyright (c) Six Labors
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
+
+   "You" (or "Your") shall mean an individual or Legal Entity exercising permissions granted by this License.
+
+   "Source" form shall mean the preferred form for making modifications, including but not limited to software source
+    code, documentation source, and configuration files.
+
+   "Object" form shall mean any form resulting from mechanical transformation or translation of a Source form, including
+    but not limited to compiled object code, generated documentation, and conversions to other media types.
+
+   "Work" (or "Works") shall mean any Six Labors software made available under the License, as indicated by a
+   copyright notice that is included in or attached to the work.
+
+   "Direct Package Dependency" shall mean any Work in Source or Object form that is installed directly by You.
+
+   "Transitive Package Dependency" shall mean any Work in Object form that is installed indirectly by a third party
+    dependency unrelated to Six Labors.
+
+2. License
+
+   Works in Source or Object form are split licensed and may be licensed under the Apache License, Version 2.0 or a
+   Six Labors Commercial Use License.
+
+   Licenses are granted based upon You meeting the qualified criteria as stated. Once granted,
+   You must reference the granted license only in all documentation.
+
+   Works in Source or Object form are licensed to You under the Apache License, Version 2.0 if.
+
+   - You are consuming the Work in for use in software licensed under an Open Source or Source Available license.
+   - You are consuming the Work as a Transitive Package Dependency.
+   - You are consuming the Work as a Direct Package Dependency in the capacity of a For-profit company/individual with
+     less than 1M USD annual gross revenue.
+   - You are consuming the Work as a Direct Package Dependency in the capacity of a Non-profit organization
+     or Registered Charity.
+
+   For all other scenarios, Works in Source or Object form are licensed to You under the Six Labors Commercial License
+   which may be purchased by visiting https://sixlabors.com/pricing/.

MCGalaxy/Events/IPluginEvent.cs

@@ -16,7 +16,6 @@
     permissions and limitations under the Licenses.
  */
 using System;
-using System.Collections.Generic;
 
 // kept in this namespace for backwards compatbility
 namespace MCGalaxy