add a license and readme

LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2024 Jan-Erik Rediger <janerik@fnordig.de>
+
+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.

README.md

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+# Texttools Dot Tcl
+
+Recently I read Hillel Wayne's article about [his texttools.py implementation](texttools.py).
+
+I also looked into [Tcl] a bit.
+So what better way than to combine these too and port his Python implementation (which was already using Tk) to Tcl (and Wish).
+The functionality is simple:
+Paste text in the top box, choose a transform, output appears in the bottom box.
+
+![Screenshot of the application running](texttools.png)
+
+[tcl]: https://www.tcl.tk/
+[texttools.py]: https://buttondown.com/hillelwayne/archive/texttools-dot-py/
+
+## License
+
+[MIT](LICENSE)