feature: RTL Support

[hamidKMB]

right now the RTL direction looks like a disaster.
it'll be very great if your team implements this feature

[hamidKMB]

I'd like to help your team develop this feature, just let me know how I can do this

[neSpecc]

Thanks, @hamidKMB . First, let's update your issue with details. Create a list of bad-looking places

[hamidKMB]

hi @neSpecc .
I hope you doing well.

I created an editorjs playground in codesandbox you can check it if you want to test the below items
playground codesandbox https://codesandbox.io/s/editor-js-forked-r6gtt6?file=/src/editor.js:

** better to open it in new window **

before everything I have to mention that plus the bad-looking parts there are some functionality problems that I've mentioned below

Bad-looking Problems
1- the add-column button integrated with the table

2- the column toolbox selects the wrong column

3- both LTR and RTL direction shows the sider-quick-compose-btn element like below

Functionality Problems:

1. the add-column integrated with the table not working at all. even hovering does not apply to it
2. in the column toolbox doesn't matter user clicks on add a column to the left or right, it always adds a column to the left

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the rows toolbox and button integrated with the table work fine and haven't any problem

[neSpecc]

@hamidKMB Seems clear now. You can try to resolve these problems.