Update LICENSE to AGPL v3 (#182)

See Discussion #180.

4.0.0-beta2 is the last source release and 3.0.0 is the last binary
release that is MIT-licensed. All source code in master before this PR
is merged is MIT-licensed as well. All source code and releases of any
form including and after this commit will be AGPL v3 licensed.

This will likely not impact you if you just use this as a tool on your
local computer to translate source code as the project intends. It
primarily impacts users that embed the core JavaToCSharp library into
their applications, or use the CLI as an automated tool as part of an
open-source or commercial platform. See #180 for more details.

Commercial support and licensing is available for any organizations that
need a different license.

Author: paulirwin

JavaToCSharp/JavaToCSharp.csproj

@@ -7,8 +7,8 @@
         <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
         <Authors>Paul Irwin</Authors>
         <Description>A Java to C# converter.</Description>
-        <Copyright>Copyright 2021-2025, Paul Irwin</Copyright>
-        <PackageLicenseExpression>MIT</PackageLicenseExpression>
+        <Copyright>Copyright 2021-2026, Paul Irwin</Copyright>
+        <PackageLicenseExpression>AGPL-3.0</PackageLicenseExpression>
         <RepositoryUrl>https://github.com/paulirwin/JavaToCSharp</RepositoryUrl>
         <LangVersion>latest</LangVersion>
     </PropertyGroup>