Update Contributing.md

Author: iancooper

Contributing.md

@@ -258,6 +258,41 @@ Our code is organized as follows:
     - If code has a complex algorithm or non-obvious implementation, prefer to use `///<remarks>`
 - Document new features and changes in the Docs repository of the BrighterCommand organization.
 
+### Licensing
+- We add a license comment to every src file, at the top of the file.
+- We use the MIT licence.
+- You should add your name and the year, if it is a new file.
+- You should put the license comment in a `# region Licence` block
+- An LLM should use the name and year of the contributor instructing the LLM
+- As an example
+
+`
+  #region Licence
+
+/* The MIT License (MIT)
+Copyright © [Year] [Your Name] [Your Contact Email]
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the “Software”), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+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. */
+
+#endregion
+`
+
 ## Dependency Management
 
 - Use Directory.Packages.props for central package management.