chore: add contributing guide

CONTRIBUTING.md

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+# Welcome!
+
+Welcome to the Axolotl language files, first off, thank you for taking the time to consider contributing!
+All contributions are extremely helpful and greatly appreciated!
+
+This document contains a set of guides for contributing to this project.
+
+<details>
+<summary>Table of Contents</summary>
+
+<!-- TOC -->
+* [Welcome!](#welcome)
+* [Code of Conduct](#code-of-conduct)
+* [Questions](#questions)
+* [Contributing](#contributing)
+  * [Submitting issues](#submitting-issues)
+  * [Translating a message](#translating-a-message)
+  * [Translating to a new language](#translating-to-a-new-language)
+<!-- TOC -->
+</details>
+
+# Code of Conduct
+
+Please help keep this project open and inclusive for all.  
+Read and follow the [Code of Conduct](https://github.com/HyperaDev/.github/blob/main/CODE_OF_CONDUCT.md) before
+contributing to this repository.
+
+If you have encountered someone who is not following the Code of Conduct, please report them
+to [[email protected]](mailto:[email protected]).
+
+# Questions
+
+> **Please do not use GitHub issues to ask questions.** You will get a faster response if you ask on Discord!
+
+If you wish to ask a question, please contact us using Discord by joining
+the [Hypera Development Discord server](https://discord.hypera.dev/), and you will get a response as soon as
+someone is next available.
+
+# Contributing
+
+There are many ways to contribute to `hypera.dev/lib`, and they all help!  
+Here are the most common types of contributions:
+
+* [Submitting issues](#submitting-issues)
+  * [Security vulnerabilities](#security-vulnerabilities)
+* [Suggesting features](#suggesting-features)
+* [Code contributions](#code-contributions)
+* [Supporting the authors](#supporting-the-authors)
+
+## Submitting issues
+
+If you have found a typo, grammatical issue, missing translation, or another issue, you can help us
+by [creating an issue](https://github.com/HyperaDev/axolotl-lang/issues/new)!
+
+If you have the time and required knowledge, you can
+also [create a pull request](https://github.com/HyperaDev/axolotl-lang/compare) to resolve the issue!
+
+## Translating a message
+
+If you have found a message that has not been translated to an already supported locale that you can translate, you can
+help us greatly by [create a pull request](https://github.com/HyperaDev/axolotl-lang/compare) to translate the message!
+
+## Translating to a new language
+
+Do you know a language that we don't currently support? You can help us greatly by contributing a new translation file
+for the language! If you only have the time to translate some of the messages, that is okay! Having some translations is
+a lot better than none.
+
+Please note that we are only able to support locales also supported by Discord.
+You can see all locales supported by Discord at https://discord.com/developers/docs/reference#locales.
+
+To translate to a new language:
+ - Create a file in [`locales`](locales) for the language, using the BCP 47 language tag.
+ - Translate messages from [`locales/en-GB.toml`](locales/en-GB.toml) (or the language file that you can understand).
+ - Add the locale to `supportedLocales` in [`lang.go`](lang.go) (You can see all options
+in [discordgo](https://github.com/bwmarrin/discordgo/blob/master/locales.go))
+ - [Create a pull request](https://github.com/HyperaDev/axolotl-lang/compare) to contribute them to this repository!
+
+
+Thank you to everyone who has contributed! :D