feat: first overhaul

docs/docs/codebase/index.md

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+# Codebase Overview
+
+This part of the documentation is for the [Tachi-Server](https://github.com/TNG-dev/Tachi/tree/staging/server) codebase.
+
+## Codebase Documentation vs. Code Documentation
+
+This is documentation for the **Codebase**. **NOT** documentation for the code.
+
+The distinction is because we aren't writing a library here - there's no need to document function
+signatures or what function calls are meant to do. That can all be done inline because no other
+projects depend on our function calls!
+
+This documentation is more meta-level. Why things are in certain folders, what certain enums
+correspond to, how `thing` works, etc.
+
+## Repos and Licenses
+
+Tachi is a monorepo, and is made up of many projects. These are:
+
+- `client/`, Which is a React frontend for Tachi.
+
+The client and the server are fairly decoupled. Someone could trivially create their own frontend client for Tachi.
+
+- `server/`, Which is an Express-Typescript backend for Tachi.
+
+This contains all of our API calls, and interfaces with our database, and powers the actual score import engine.
+
+- `database-seeds/`, Which is a git-tracked set of data to be synced with Tachi.
+
+**This is the source of truth for the songs, charts, and more on the site!**
+By submitting PRs to this, you can fix bugs on the website, add new charts, and more.
+
+- `bot/`, Which is a discord bot frontend for Tachi.
+
+- `common/`, Which contains common types, utils and functions shared between all other packages.
+
+This is also published to NPM when it hits production.
+
+- `docs/`, Which contains Tachi documentation.
+
+- `sieglinde/`, Which contains our BMS/PMS analysis functions.
+
+Of these, `server/` and `client/` are licensed under the AGPL3. The `database-seeds/` are licensed under the unlicense, and everything else is MIT.