add a roadmap to our various mono-repos (#318)

Author: devoncarew

README.md

@@ -16,6 +16,33 @@ This repository is home to general Dart Ecosystem tools and packages.
 | [sdk_triage_bot](pkgs/sdk_triage_bot/) | A triage automation tool for dart-lang/sdk issues. |  |
 | [trebuchet](pkgs/trebuchet/) | A tool for moving existing packages into monorepos. |  |
 
+## Dart mono-repos
+
+Here's an overview of the main Dart team repositories:
+
+| Main repo | Description |
+| --- | --- |
+| [sdk](https://github.com/dart-lang/sdk) | The Dart SDK, including the VM, JS and Wasm compilers, analysis, core libraries, and more. |
+
+| SLO mono-repos | Description |
+| --- | --- |
+| [core](https://github.com/dart-lang/core) | This repository is home to core Dart packages. |
+| [tools](https://github.com/dart-lang/tools) | This repository is home to tooling related Dart packages. |
+| [labs](https://github.com/dart-lang/labs) | This repository is home to Dart 'labs' packages. |
+
+| Topic mono-repos | Description |
+| --- | --- |
+| [build](https://github.com/dart-lang/build) | A build system for Dart written in Dart |
+| [ecosystem](https://github.com/dart-lang/ecosystem) | This repository is home to general Dart Ecosystem tools and packages. |
+| [http](https://github.com/dart-lang/http) | A composable API for making HTTP requests in Dart. |
+| [i18n](https://github.com/dart-lang/i18n) | A general mono-repo for Dart i18n and l10n packages. |
+| [leak_tracker](https://github.com/dart-lang/leak_tracker) | A framework for memory leak tracking for Dart and Flutter applications. |
+| [macros](https://github.com/dart-lang/macros) | A Dart mono-repo for macro development. |
+| [native](https://github.com/dart-lang/native) | Dart packages related to FFI and native assets bundling. |
+| [shelf](https://github.com/dart-lang/shelf) | Web server middleware for Dart |
+| [test](https://github.com/dart-lang/test) | A library for writing unit tests in Dart. |
+| [webdev](https://github.com/dart-lang/webdev) | A CLI for Dart web development. |
+
 ## Publishing automation
 
 For information about our publishing automation and release process, see