Feat: produce an .msi for windows CI

wix/License.rtf

@@ -0,0 +1,20 @@
+{\rtf1\ansi\deff0\nouicompat{\fonttbl{\f0\fswiss\fcharset0 Helvetica;}}
+{\*\generator Msftedit 5.41.21.2510;}\viewkind4\uc1
+\pard\sa200\sl276\slmult1\f0\fs20\lang9
+
+CAGIRE - Forth-based Music Sequencer\par
+Copyright (c) 2025 Rapha\"el Forment\par
+\par
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published
+by the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.\par
+\par
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Affero General Public License for more details.\par
+\par
+You should have received a copy of the GNU Affero General Public License
+along with this program. If not, see https://www.gnu.org/licenses/.\par
+}