Text editor: Add notepad3 introduction

[zoziha]

Description

Notepad3 released a pre-release version yesterday, which supports Fortran syntax highlighting (with my contribution last year). I think Notepad3 has a more modern and beautiful highlighting style, and I really like its syntax highlighting in Markdown.

Syntax highlighting in Fortran

Since it supports Fortran syntax highlighting, and it can replace Notepad under Windows, it is convenient for me to use it on the command line:

notepad main.f90

NOTE: It only supports Windows OS.

We can add a link of Notepad3 to this page in the Fortran webpage.

I'll consider adding a PR for this next week.

[Mohnaa]

I can contribute on this issue.

[the-sarthakjain]

I have a good knowledge of html and css so i would try contribute to solve this issue.

[harshit4311]

I would love working on this issue! Could you please assign it to me?

[asmitdash]

Hey @zoziha I have made the changes and added the link, can you assign this issue to me so that I can make a PR?