feat: add tabBarSpacing property

[mlecoq]

Motivation

The goal is to support spacing between tabs ( see #1020 ) - It is roughly doable with some customizations (thanks to renderTabBarItem and renderIndicator methods) but it requires to modify internal methods (getTranslateX for example)

Test plan

I have added one example ( TabBarSpacingExample )

[blueberry6401]

@satya164 What do you think about this? It's very nice if we have this props.

[dparrelli]

Would definitely find this feature quite useful 👍

[hirbod]

Also add my vote on this 👍

[Kerumen]

@mlecoq Do you have some time to rebase the PR? 🙏🏻

This way @satya164 can have a look and maybe include it in the next release!

[mlecoq]

@Kerumen I'll make it soon (tomorrow)

[github-actions]

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[felipejh]

Would definitely find this feature quite useful +1

[okwasniewski]

Hey @mlecoq, thanks for your PR! Can you rebase this with the main branch? I will review this once you rebase it and test it again current pager-version.

[mlecoq]

Hey @mlecoq, thanks for your PR! Can you rebase this with the main branch? I will review this once you rebase it and test it again current pager-version.

Done !

[okwasniewski]

Also just for naming, please remove the tabBar prefix and change the name to gap to match the CSS property which does the same thing

[mlecoq]

Also just for naming, please remove the tabBar prefix and change the name to gap to match the CSS property which does the same thing

@okwasniewski Thanks for your feedback, I think I have taken into account all your remarks, please let me know if something is missing