Add contributing guidelines

CONTRIBUTING.md

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+# Contributing to FastForward
+Thanks for taking the time to contribute to FastForward, it is volunteers like you who make this project possible.
+
+## Contibuting bypasses
+
+### Making the bypass
+Initially, you may use the custom bypasses section on the extension's settings page to test out and formulate your bypass, but after that we reccomend using a code editor like [VSCode](https://code.visualstudio.com/download)/[Codium](https://vscodium.com/#install).
+
+### Submitting a Pull Request
+
+When submitting a pull please take care that:
+- Your code follows [the code style](docs/CODE_STYLE.md#code-style)
+- Commit messages should be descriptive
+- If its a small change [squash all your commits](docs/Git_CLI.md#squashing-commits)
+- Follow the pull request template
+
+Consider joining the [Discord](https://discord.gg/RSAf7b5njt) so that we can discuss the PR in real time.

docs/CODE_STYLE.md

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+### Code style:
+- [Standard JS](https://standardjs.com/rules.html) + [Prettier](https://prettier.io/)
+- Unix EOL (LF)
+- Newline at end of file
+
+### How to set this up on VScode/Codium:
+- Extension: [VSCode marketplace](https://marketplace.visualstudio.com/items?itemName=numso.prettier-standard-vscode)
+- Newline at end of file: [stackoverflow.com/a/44704969](https://stackoverflow.com/a/44704969)

docs/Git_CLI.md

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+Install git before using the any of the commands. https://git-scm.com/downloads
+
+---
+### Squashing commits
+to make this:
+
+>• Update readme.md
+>
+>• Update readme.md
+>
+>• Update readme.md
+>
+>• Update readme.md
+
+Into this: 
+
+> • Fix link in README
+
+
+Open the terminal and run the following commands. 
+NOTE: Remember to substitue all `<things>`
+```
+git clone https://github.com/<your username>/FastForward
+```
+```
+cd FastForward
+```
+```
+git reset --soft HEAD~<number of commits you want to squash>
+```
+```
+git commit -m "<your message>"
+```
+NOTE: When git asks for your password use a [PAT](https://github.com/settings/tokens).
+```
+git push --force
+```
+---
+### Fixing a messed up main branch
+NOTE: If you have made any changes on your main brainch they **will be lost.**
+
+Open the terminal and run the following commands. 
+NOTE: Remember to substitue all `<things>`
+```
+git clone https://github.com/<your username>/FastForward
+```
+```
+cd FastForward
+git remote add upstream https://github.com/FastForwardteam/FastForward
+git fetch upstream
+git checkout main
+git reset --hard upstream/main 
+
+```
+
+NOTE: When git asks for your password use a [PAT](https://github.com/settings/tokens).
+```
+git push origin main --force 
+```