Clarify licence and add CONTRIBUTING.md

CONTRIBUTING.md

@@ -0,0 +1,40 @@
+This file is marked [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/).
+
+## AI guidelines
+
+This project does not take contributions substantially or wholly generated by AI.
+
+The definition of a contribution must be taken as very broad.
+It includes the code in PRs, but also the text written in issues and the like.
+
+---
+
+Limited use of AI is permitted in these situations:
+- No artifact generated by an AI is submitted to the repo
+  - For example: You may use an agent to ask questions about the codebase
+  - Though, AI code reviews are not permitted as that would be a wholly AI generated contribution
+- Artifacts inspired by AI are submitted to the project
+  - For example: You may use a chat as rubber duck or to ask for inspiration
+- Artifacts contain small obvious snippets suggested by AI
+  - For example, you may ask an AI something you would otherwise typically use StackOverflow for
+  - But, normal StackOverflow principles apply: make sure the snippet is good and that it doesn't infringe on anyone's copyright
+  - This means very limited use of tab-completion style AI is allowed, though frowned upon
+
+---
+
+These restrictions are there to:
+- keep the project a human project
+  - empathic
+  - inviting
+  - intriguing
+- keep the project maintainable
+  - enjoyable
+  - quality
+- limit the harms of AI, while not shutting the door for some of the useful sides of AI
+- assure the provenance of the project and having no doubts over the copyright status
+
+---
+
+Any person (or bot) not following these guidelines may get muted or banned from the project if said person is deemed to act not in good faith.
+
+These guidelines may evolve over time as the technology and the thinking around it changes.

LICENSE-MIT

@@ -0,0 +1,25 @@
+Copyright (c) 2015-2025 The rust-measurements Authors
+
+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

@@ -2,21 +2,21 @@
 
 [![Build Status](https://github.com/rust-embedded-community/rust-measurements/workflows/Build/badge.svg)](https://github.com/rust-embedded-community/rust-measurements/actions?query=workflow%3ABuild)
 
-### Why should I care? I already have numbers...
+## Why should I care? I already have numbers...
 
 Working with units can be very error prone.
 If one person is working in feet and one person is working in meters, what happens?
 
 Doing all of your math in raw numerical types can be unsafe and downright confusing.
 What can we do to help?
 
-### Typed measurements to the rescue!
+## Typed measurements to the rescue!
 
 Working in typed measurements increases safety by dealing with what you really care about: units of measure.
 
 Conversions to and from different units are simple, and operator overrides allow you to work with the measurements directly.
 
-### Currently available measurement types
+## Currently available measurement types
 
 - Acceleration
 - Angle
@@ -40,7 +40,7 @@ Conversions to and from different units are simple, and operator overrides allow
 - Voltage
 - Volume
 
-### Examples
+## Examples
 
 In your Cargo.toml add the dependency...
 
@@ -83,7 +83,7 @@ fn main() {
 }
 ```
 
-### Features
+## Features
 
 The crate contains few features to disable or enable certain functionalities:
 
@@ -92,6 +92,19 @@ The crate contains few features to disable or enable certain functionalities:
 * from_str
     * Allows creating measurement units from string input
 
+## Licence
+
+This project is licensed under the MIT license ([LICENSE-MIT](LICENSE-MIT) or <http://opensource.org/licenses/MIT>).
+
+## Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally
+submitted for inclusion in the work by you, as defined in the Apache-2.0
+license, shall be licensed as above, without any additional terms or
+conditions.
+
+Contributions must be in accordance with the notices in [CONTRIBUTING.md](./CONTRIBUTING.md).
+
 --------------------------------------
 
 **References**