[Feature]: Don't repeat [[file links]] even if it is present outside the code/comment block of the Index file

## Appreciation
* Great plugin brother, you have made indexing of notes extremely easy

## Current
* The plugin only updates [[file links]] inside the code/comment block of the Index file but don't track the links outside the block in that Index file

## Demand
* [Feature]: Don't repeat [[file links]] even if it is present outside the code/comment block of the Index file

## Use case
* The plugin would be used to track the [[file links]] inside a particular folder
* Outside the ``%% Zoottelkeeper: Beginning of the autogenerated index file list %%`` block one can customize his/her Index file
* Hence tracking/[[#Demand]] becomes important as to ensure duplication of links in the Index file is prevented