Add from existing sources. Originates from:

> commit f1d070047a080e33d773330b53e81435062bc42c
> Author: Andreas Fankhauser hiddenalpha.ch <23085769+hiddenalpha@users.noreply.github.com>
> Date:   2023-05-26 15:51:46 +0200

1 files changed, 21 insertions, 0 deletions

diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 0000000..fe1856d
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,21 @@
+
+Copyright (c) 2024 hiddenalpha.ch
+
+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.