Migrate to using docusaurus, rather than docsify for documentation (#603)

* Add docusaurus documentation (to replace the docsify setup
* Remove older docs
* Specify documentation as the gh pages build action working directory

documentation/docs/features/all_features.md

@@ -0,0 +1,35 @@
+---
+sidebar_position: 1
+---
+
+# Features
+
+Khoj supports a variety of features, including search and chat with a wide range of data sources and interfaces.
+
+#### [Search](/docs/features/search.md)
+  - **Local**: Your personal data stays local. All search and indexing is done on your machine.
+  - **Incremental**: Incremental search for a fast, search-as-you-type experience
+
+#### [Chat](/docs/features/chat.md)
+  - **Faster answers**: Find answers faster, smoother than search. No need to manually scan through your notes to find answers.
+  - **Iterative discovery**: Iteratively explore and (re-)discover your notes
+  - **Assisted creativity**: Smoothly weave across answers retrieval and content generation
+
+#### General
+  - **Natural**: Advanced natural language understanding using Transformer based ML Models
+  - **Pluggable**: Modular architecture makes it easy to plug in new data sources, frontends and ML models
+  - **Multiple Sources**: Index your Org-mode and Markdown notes, PDF files, Github repositories, and Photos
+  - **Multiple Interfaces**: Interact from your [Web Browser](/docs/clients/web.md), [Emacs](/docs/clients/emacs) or [Obsidian](/docs/clients/obsidian)
+
+### Supported Interfaces
+
+[![Khoj on Emacs](https://img.shields.io/badge/Emacs-%237F5AB6.svg?&style=for-the-badge&logo=gnu-emacs&logoColor=white)](/docs/clients/emacs)
+<span>&nbsp;</span>
+[![Khoj on Obsidian](https://img.shields.io/badge/Obsidian-%23483699.svg?style=for-the-badge&logo=obsidian&logoColor=white)](/docs/clients/obsidian)
+
+### Supported Data Sources
+- markdown
+- org-mode
+- pdf
+- [github](/docs/online-data-sources/github_integration.md)
+- [notion](/docs/online-data-sources/notion_integration.md)