Readme and license

LICENSE

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+MIT License
+
+Copyright (c) 2023 Roberto Alsina <roberto.alsina@gmail.com>
+
+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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+# Pre-commit hooks.
+
+Hooks to use with [Pre-commit](https://pre-commit.com/)
+
+To use them, add this in your `.pre-commit-config.yml`
+
+```yaml
+    - repo: https://git.ralsina.me/ralsina/pre-commit-hooks.git
+      rev: main
+      hooks:
+          - id: whatever-hook-you-like
+```
+
+After you install, you can use `pre-commit autoupdate` when it complains that main is whatever.
+
+Current hooks:
+
+## ameba
+
+Run the [Ameba](https://github.com/crystal-ameba/ameba) static analysis tool for [Crystal](https://crystal-lang.org)