Create Waku Roadmap H2 2023

[Amelia7689]

New blog post: Waku H2 2023 roadmap

[fryorcraken]

@Amelia7689 thank you for that.

I have corrected few things as the content needs to be in a mdx file. I added a few "TODO" in the text, can you tackle them?

Please ensure the website runs correctly, see build instructions in readme.

Pending item:

• rename file to match target publish date
• some TODO items in files
• add your details to the author file
• the style props are creating an issue: The style prop expects a mapping from style properties to values, not a string. For example, style={{marginRight: spacing + 'em'}} when using JSX.

Cc @jinhojang6 to assist