Summary:
Some minor fixes in the RNTester that were bugging me a bit:
- Playground tab icon is not displaying the correct icon when the tab is active.
- The RNTTestDetails button is being displayed when there is nothing to display.
- Export the data for the Playground tab correctly to display the description.
## Changelog:
[INTERNAL] - RNTester: Fix playground icon & test details button
Pull Request resolved: https://github.com/facebook/react-native/pull/50530
Test Plan:
<details>
<summary>Screenshots</summary>
| Before | After |
|------------------------------------|------------------------------------|
|  |  |
</details>
Reviewed By: NickGerleman
Differential Revision: D72576804
Pulled By: cortinico
fbshipit-source-id: 8555677a5121fe908c18d349e80ce8097d144fe5
Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/46632
Changelog: [General][Added] Add Playground to RNTester for testing out features & submitting reproducers.
**Context**
- Adding the Playground from Catalyst to RNTester
- This should help folks test React Native features for a particular version
**Change**
- Add a new playground component to RNTester
- Add a new reducer action for opening an example from navbar press
- Fixed typing issues
- Add icon from this fb asset pack: https://www.internalfb.com/assets/set/facebook_icons/nucleus-beaker/variant_outline-size_24?q=beaker
- Matched background color using this imagemagick script
**dark**
```
convert input.png -fill 'rgb(178,180,186)' -colorize 100% output.png
```
**light**
```
convert input.png -fill 'rgb(81,82,84)' -colorize 100% output.png
```
Reviewed By: NickGerleman
Differential Revision: D61972594
fbshipit-source-id: 4a5523a84a6ef09d3266d5f56825907bd3fbe4b5