feat: crated thumbnail using expo-video-thumbnail

[OtavioStasiak]

Proposed changes

Create a thumbnail to improve the video component UX.

Issue(s)

https://rocketchat.atlassian.net/browse/NATIVE-226

How to test or reproduce

• Open the app;
• Open a room that has a video;

Screenshots

IOS:

Before:

videoIosBefore.mov

After:

Gravacao.de.Tela.2024-10-02.as.17.52.36.mov

Android:

Before:

android_before.webm

After:

videoPrAndroid.webm

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves a current function)
• New feature (non-breaking change which adds functionality)
• Documentation update (if none of the other choices apply)

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works (if applicable)
• I have added necessary documentation (if applicable)
• Any dependent changes have been merged and published in downstream modules

Further comments

[CLAassistant]

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[diegolmello]

Almost there.
Lint is failing.

[diegolmello]

Don't use fixed colors. Everything should come from themes.

[diegolmello]

Can you use flex?

[diegolmello]

You asked my opinion about splitting Thumbnail in a separate file.
I said we should either keep on Video file (it's a small file, so it's ok) or we create a Video folder so message/Components/Attachments is organized with one file per feature.

You create Thumbnail file without a Video folder, so Attachments now have

- CollapsibleQuote (folder)
- Image (folder) 
- AttachedActions.tsx
- Attachments.tsx
- Audio.tsx
- Reply.tsx
- Video.tsx
- Thumbnail.tsx (this one is only related to Video)