Create Obsidian plugin for Khoj

- Features
  - Search using Khoj from within the Obsidian app
    Allow Natural language search on your (markdown) notes in Obsidian Vault

  - Show search results as rendered (instead of raw) Markdown
    Improve legibility of the results

  - Jump to selected note from search result in Khoj search modal
    Simplify seeing result within its original note context

  - Automatically configure khoj to index markdown files in current vault
    Reduce khoj setup steps for plugin users by using reasonable defaults

    - Code updates the markdown config in khoj.yml and triggers index update
    - It can be configured by user in khoj plugin settings, if required

  - Add Demo and detailed Readme for the Obsidian plugin
    Ease setup and usage. Give context about capabilities

- Miscellaneous
  - Trying keep a mono repo until the Khoj project is mature enough
    to reduce maintainance burden

src/interface/obsidian/styles.css

@@ -0,0 +1,8 @@
+/*
+
+This CSS file will be included with your plugin, and
+available in the app when your plugin is enabled.
+
+If your plugin does not need CSS, delete this file.
+
+*/