docs: add contributing (#1)

Additionally fix typo in readme for workflow

Author: ricochet

CONTRIBUTING.md

@@ -0,0 +1,22 @@
+# Contributing
+
+This project welcomes contributions for bug fixes, documentation updates, new
+features, or whatever you might like. Development is done through GitHub pull
+requests. Feel free to reach out on the [Bytecode Alliance
+Zulip](https://bytecodealliance.zulipchat.com/) as well if you'd like assistance
+in contributing or would just like to say hi.
+
+## Code of Conduct
+
+This is a [Bytecode Alliance](https://bytecodealliance.org/) project, and follows the Bytecode Alliance's [Code of Conduct](https://github.com/bytecodealliance/governance/blob/main/CODE_OF_CONDUCT.md).
+
+## License
+
+This project is licensed under the Apache 2.0 license with the LLVM exception.
+See [LICENSE](LICENSE) for more details.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in this project by you, as defined in the Apache-2.0 license,
+shall be licensed as above, without any additional terms or conditions.

README.md

@@ -1,5 +1,7 @@
 # `setup-wasi-sdk-action`
 
+A [Bytecode Alliance](https://bytecodealliance.org/) project
+
 [![Cross-platform](https://github.com/bytecodealliance/setup-wasi-sdk-action/actions/workflows/cross-platform.yml/badge.svg?branch=main)](https://github.com/bytecodealliance/setup-wasi-sdk-action/actions/workflows/cross-platform.yml)
 [![CMake-compatible](https://github.com/bytecodealliance/setup-wasi-sdk-action/actions/workflows/cmake.yml/badge.svg?branch=main)](https://github.com/bytecodealliance/setup-wasi-sdk-action/actions/workflows/cmake.yml)
 [![Environment-safe](https://github.com/bytecodealliance/setup-wasi-sdk-action/actions/workflows/env-safe.yml/badge.svg?branch=main)](https://github.com/bytecodealliance/setup-wasi-sdk-action/actions/workflows/env-safe.yml)
@@ -26,7 +28,7 @@ runner:
 
 For more advanced usage, see the following examples:
 - [Use with CMake](.github/workflows/cmake.yml)
-- [Use without overriding environment](.github/workflows/variables.yml)
+- [Use without overriding environment](.github/workflows/env-safe.yml)
 
 ### Inputs