Document Enhancement and Formatting Updates (#4069)

* 'Export' changed to 'Extract'

* Numbered the headings and subheadings

* Added table of contents

* sample links added

* Links added

* added more 'RUN LIVE' links

* More 'RUN LIVE' links added, more typo enhanced

* more 'RUN LIVE' links added, typos enhanced

* Linked table of contents with the headings and sub-headings

Author: Ubayed-Bin-Sufian