feat: Add mouse-text icon

[csandman]

Closes #508

This PR is for my version of a mouse cursor when hovering over text.

Here is a scaled up view of it:

And here is a real size version:

I believe it follows all of the guidelines from this post - #171 (comment)

If there is anything that should be changed, please let me know! I will change anything as needed asap.

[codecov]

Codecov Report

Merging #897 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #897   +/-   ##
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  Coverage   100.00%   100.00%           
=========================================
  Files            5         5           
  Lines           34        34           
  Branches         3         3           
=========================================
  Hits            34        34           

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[locness3]

Wasn't this already submited ? Anyway, looks good. But maybe not calling it mouse-text, maybe cursor-text

[csandman]

@locness3 I had posted in a comment but that thread seemed to die so I figured I would submit a PR. And I'd be cool with that name, I was trying to keep it consistent with the other mouse icon (mouse-pointer). I can change it to whatever works best!

[ericfennis]

@csandman Nice love this icon.
Do like to contribute this icon to featherity ? Or may we use this one there?