Fix TS types for editor package

[manzoorwanijk]

What?

This PR fixes TS types for editor package.

Why?

Currentl, the types for the package are broken because of the third-party types package - @types/wordpress__editor, which we can deprecate following this PR.

How?

The problem with types was that the store object exported by the package was typed as object, which prevented the type generator from setting the types correctly. Thus this PR removes that type annotation to allow inference from imports

Testing Instructions

• Before this PR, IDE like VS Code would tell you that it is unable to find the type declarations for the package and would suggest to install the above mentioned third-party types package, you can verify that VS Code no longer suggests that.
• When you install the third-party types package, the types for useSelect and useDispatch are broken and TS yells that the selector is not callable or the method doesn't exist. You can verify that things will work fine without the third-party types

Testing Instructions for Keyboard

Screenshots or screencast

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Co-authored-by: manzoorwanijk <[email protected]>

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