docs: meaningful page description for OverKeyboardView (#646)

## 📜 Description

Added meaningful description for `OverKeyboardView` page for preview.

## 💡 Motivation and Context

`<Lottie` as description doesn't make any sense to developers + makes
SEO search worse.

## 📢 Changelog

<!-- High level overview of important changes -->
<!-- For example: fixed status bar manipulation; added new types
declarations; -->
<!-- If your changes don't affect one of platform/language below - then
remove this platform/language -->

### Docs
- changed preview of `OverKeyboardView` page;

## 🤔 How Has This Been Tested?

Tested via preview.

## 📸 Screenshots (if appropriate):

|Before|After|
|-------|-----|
|<img width="1018" alt="image"
src="https://github.com/user-attachments/assets/504db84c-df75-47db-9940-d894b6fe2ea6">|<img
width="1023" alt="image"
src="https://github.com/user-attachments/assets/ad8df4aa-2e59-405c-9588-7c33cc28c837">|

## 📝 Checklist

- [x] CI successfully passed
- [x] I added new mocks and corresponding unit-tests if library API was
changed

Author: kirillzyusko

docs/docs/api/over-keyboard-view/index.mdx

@@ -1,5 +1,6 @@
 ---
 sidebar_position: 7
+description: Display views over keyboard without closing it.
 keywords:
   [
     react-native-keyboard-controller,

docs/versioned_docs/version-1.14.0/api/over-keyboard-view/index.mdx

@@ -1,5 +1,6 @@
 ---
 sidebar_position: 7
+description: Display views over keyboard without closing it.
 keywords:
   [
     react-native-keyboard-controller,