chore(): PR template

[ShaMan123]

Created a PR template with a notice regarding a PR lockdown for the migration.
Needless to say I shall be enforcing this lockdown on myself as of now 😐 (Well maybe just one more rtl fix).

😅

[github-actions]

Code Coverage Summary

> fabric@5.1.0 coverage:report
> nyc report --reporter=lcov --reporter=text

-----------|---------|----------|---------|---------|-----------------------------------------------
File       | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s                             
-----------|---------|----------|---------|---------|-----------------------------------------------
All files  |   83.18 |    76.54 |   86.24 |    82.9 |                                               
 fabric.js |   83.18 |    76.54 |   86.24 |    82.9 | ...,29966,30091,30171-30236,30359,30458,30694 
-----------|---------|----------|---------|---------|-----------------------------------------------

[ShaMan123]

done

[github-actions]

Code Coverage Summary

> fabric@5.1.0 coverage:report
> nyc report --reporter=lcov --reporter=text

-----------|---------|----------|---------|---------|-----------------------------------------------
File       | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s                             
-----------|---------|----------|---------|---------|-----------------------------------------------
All files  |   83.13 |    76.55 |   86.23 |   82.85 |                                               
 fabric.js |   83.13 |    76.55 |   86.23 |   82.85 | ...,29958,30083,30163-30228,30351,30450,30686 
-----------|---------|----------|---------|---------|-----------------------------------------------

[ShaMan123]

The template isn't visible when opening a PR
I probably named something wrong.
But what?

https://docs.github.com/en/enterprise-server@3.4/communities/using-templates-to-encourage-useful-issues-and-pull-requests/creating-a-pull-request-template-for-your-repository

[ShaMan123]

This does work

https://github.com/fabricjs/fabric.js/compare/master...abc?quick_pull=1&template=pull_request_template.md

maybe you need to configure something?