feat(BBBSearch): add search component

[AtilaU19]

What does this PR do?

Implements the BBBSearch component.

Features:

• Built-in debounce (configurable, defaults to 500ms)
• Clear button that bypasses debounce for immediate feedback
• Loading spinner via isLoading prop (mutually exclusive with clear button)
• Supports both uncontrolled (default) and controlled modes
• Uses type="search" for improved browser and accessibility semantics
• Accessible: aria-label, role="searchbox", keyboard-friendly clear button
• Styled with library design tokens (palette, sizing, typography)

Notes
BBBSearch is intentionally kept free of any GraphQL/Apollo dependency. Loading state is passed in via isLoading, allowing the caller to derive it from a subscription, a query, or any other async source. This keeps the component reusable outside the BBB core.

Closes Issue(s)

Closes #35

[Arthurk12]

@AtilaU19 Actually, there is one more place - which I've forgot to point in the previous review - that the BBBSearch has to be added:

bbb-ui-components-react/webpack.config.babel.js

Lines 4 to 18 in 2997e3b

	entry: {
	Accordion: './src/components/Accordion/index.ts',
	Button: './src/components/Button/index.ts',
	Checkbox: './src/components/Checkbox/index.ts',
	Divider: './src/components/Divider/index.ts',
	Hint: './src/components/Hint/index.ts',
	Modal: './src/components/Modal/index.ts',
	Navigation: './src/components/Navigation/index.ts',
	Select: './src/components/Select/index.ts',
	Spinner: './src/components/Spinner/index.ts',
	TextAreaInput: './src/components/TextAreaInput/index.ts',
	TextInput: './src/components/TextInput/index.ts',
	Toggle: './src/components/Toggle/index.ts',
	Typography: './src/components/Typography/index.ts',
	index: './src/index.ts',