Bring contributing content from tw.org into dev docs

docs/index.md

@@ -1,37 +1,15 @@
-## Welcome to GitHub Pages
+---
+title: Taskwarrior Development Documentation
+---
 
-You can use the [editor on GitHub](https://github.com/djmitche/taskwarrior/edit/dev-docs/docs/index.md) to maintain and preview the content for your website in Markdown files.
+This site contains the _development_ documentation for Taskwarrior.
+For all other documenation, see https://taskwarrior.org.
 
-Whenever you commit to this repository, GitHub Pages will run [Jekyll](https://jekyllrb.com/) to rebuild the pages in your site, from the content in your Markdown files.
+## Contributing to Taskwarrior
 
-### Markdown
-
-Markdown is a lightweight and easy-to-use syntax for styling your writing. It includes conventions for
-
-```markdown
-Syntax highlighted code block
-
-# Header 1
-## Header 2
-### Header 3
-
-- Bulleted
-- List
-
-1. Numbered
-2. List
-
-**Bold** and _Italic_ and `Code` text
-
-[Link](url) and ![Image](src)
-```
-
-For more details see [Basic writing and formatting syntax](https://docs.github.com/en/github/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax).
-
-### Jekyll Themes
-
-Your Pages site will use the layout and styles from the Jekyll theme you have selected in your [repository settings](https://github.com/djmitche/taskwarrior/settings/pages). The name of this theme is saved in the Jekyll `_config.yml` configuration file.
-
-### Support or Contact
-
-Having trouble with Pages? Check out our [documentation](https://docs.github.com/categories/github-pages-basics/) or [contact support](https://support.github.com/contact) and we’ll help you sort it out.
+ * [How to become an Open Source Contributor](./contrib/first_time)
+ * [Contributing to Taskwarrior](./contrib/contribute)
+ * [Developing Taskwarrior](./contrib/development)
+ * [Building Taskwarrior](./contrib/build)
+ * [Coding Style](./contrib/coding_style)
+ * [Branching Model](./contrib/branching)