Align license and readme file with SFML's structure

Author: eXpl0it3r

SFML.NuGet.props

@@ -14,7 +14,7 @@
     <PackageProjectUrl>https://www.sfml-dev.org/</PackageProjectUrl>
     <RepositoryUrl>https://github.com/SFML/SFML.Net</RepositoryUrl>
     <PackageIcon>sfml-icon.png</PackageIcon>
-    <PackageReadmeFile>README.md</PackageReadmeFile>
+    <PackageReadmeFile>readme.md</PackageReadmeFile>
 
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
   </PropertyGroup>
@@ -23,7 +23,7 @@
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="all" />
 
     <None Include="../../sfml-icon.png" Pack="true" PackagePath=""/>
-    <None Include="README.md" Pack="true" PackagePath="."/>
+    <None Include="readme.md" Pack="true" PackagePath="."/>
   </ItemGroup>
 
 </Project>

examples/netcore/README.md renamed to examples/netcore/readme.md

@@ -4,4 +4,4 @@ This project showcases how SFML.Net can be run on .NET core with NuGet packages.
 To execute this example, just run `dotnet run` inside of this directory.
 
 Please note that platform availability is still limited by native CSFML libraries.
-For more information on that, check [the main README](/README.md).
+For more information on that, check [the main readme](/readme.md).

license.txt renamed to license.md

@@ -1,7 +1,4 @@
-SFML.Net
---------
-
-SFML.Net - Copyright (C) 2007-2023 Laurent Gomila - [email protected]
+SFML.Net - Copyright (C) 2007-2025 Laurent Gomila - [email protected]
 
 This software is provided 'as-is', without any express or
 implied warranty. In no event will the authors be held
@@ -22,10 +19,3 @@ it freely, subject to the following restrictions:
 
 3. This notice may not be removed or altered from any
    source distribution.
-
-
-
-External libraries used by SFML.Net
------------------------------------
-
-* CSFML is under the zlib/png license

README.md renamed to readme.md

@@ -54,3 +54,7 @@ SFML and SFML.Net are open-source projects, and they need your help to go on gro
 Don't hesitate to post suggestions or bug reports on [the forum](https://en.sfml-dev.org/forums/)
 or post new bugs/features requests on the [issue tracker](https://github.com/SFML/SFML.Net/issues/).
 You can even fork the project on GitHub, maintain your own version and send us pull requests periodically to merge your work.
+
+## External libraries used by SFML.Net
+
+* [CSFML](https://github.com/SFML/CSFML/) is under the zlib/png license