Improvements to task extraction about markdowndb

[mohamedsalem401]

@rufuspollock
Here's how Obsidian DataView provides a way to extract fields in tasks:

1. Inline Fields Syntax:

   • Inline fields use a Key:: Value syntax in the task ( or any list item ).
   • Example:

     Basic Field:: Some random Value
     **Bold Field**:: Nice!

   • The :: double colon serves as the delimiter between the key and the field's value.

2. Bracketed Syntax for Inline Fields:

   • To embed metadata inside sentences or have multiple fields on the same line, you can use the bracket syntax and wrap your field in square brackets.
   • Example:

     I would rate this a [rating:: 9]! It was [mood:: acceptable].

3. Fields on List Items and Tasks:

   • When annotating a list item, such as a task, with metadata, you must use the bracket syntax to add fields to specific list items explicitly.
   • Example:

     - [ ] Send an email to David about the deadline [due:: 2022-04-05] [start:: 2022-04-05].

   • Bracketed inline fields are essential in this context, as they allow you to associate specific information with individual list items.

[rufuspollock]

@mohamedsalem401

Inline Fields Syntax

Don't think this is needed IMO / IME.

The useful stuff was the emoji conventions i think.