[FEATURE] Windows support

[mrousavy]

Problem

Currently there is no support for react-native-windows.

Solution

A Windows implementation.

1. Create windows/ folder
2. Create VS Solution
3. Export React Methods
4. Add Blurhash Encoder/Decoder
   1. Use .NET Encoder/Decoder
   2. Use C Encoder/Decoder and interop

[mrousavy]

Resources:

• Native Modules
• Native UI Components
• react-native-slider/windows for example usage
• reactnative.directory filtered by libraries with windows support

[mrousavy]

Progress is on the support-windows branch. ⌛