[No QA] [TS migration] Migrate 'LinearGradient' component to TypeScript

src/components/LinearGradient/index.native.ts

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+import LinearGradientNative from 'react-native-linear-gradient';
+import LinearGradient from './types';
+
+const LinearGradientImplementation: LinearGradient = LinearGradientNative;
+
+export default LinearGradientImplementation;

src/components/LinearGradient/index.ts

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+import LinearGradientWeb from 'react-native-web-linear-gradient';
+import LinearGradient from './types';
+
+const LinearGradientImplementation: LinearGradient = LinearGradientWeb;
+
+export default LinearGradientImplementation;

src/components/LinearGradient/types.ts

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+import LinearGradientWeb from 'react-native-web-linear-gradient';
+import LinearGradientNative from 'react-native-linear-gradient';
+
+type LinearGradient = typeof LinearGradientWeb | typeof LinearGradientNative;
+
+export default LinearGradient;

src/types/modules/react-native-web-linear-gradient.d.ts

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+/* eslint-disable @typescript-eslint/no-empty-interface */
+/* eslint-disable @typescript-eslint/consistent-type-definitions */
+declare module 'react-native-web-linear-gradient' {
+    import type {ViewProps} from 'react-native';
+
+    interface LinearGradientProps extends ViewProps {
+        colors: string[];
+        start?: {x: number; y: number};
+        end?: {x: number; y: number};
+        locations?: number[];
+        useAngle?: boolean;
+        angle?: number;
+    }
+
+    class LinearGradient extends React.PureComponent<LinearGradientProps> {}
+
+    export default LinearGradient;
+}