Mautic wordpress integration plugin for newsletters

Development:

If you would like to contribute, these are the steps for running the site locally on your device:

git checkout main and branch off from there

git checkout main  
git checkout -b feature-NAME  

update backend dependencies via composer.
This will install backend deps (mautic api etc).
```
cd ./backend && composer install
```
Install frontend deps.
Install dependencies needed for public assets:
```
npm install  
```
Compile frontend dependencies:
- npm run start - combine/sass/minify/babel - etc. typical gulp-ified frontend processing.
- npm run gen-dist - generate a distributable plugin bundle

Build and deploy a documentation site (www.maltyst.com):

Site is hosted on github pages and is using jekyll.
jekyll is a static site generation written in ruby, this is just what github pages uses.
Pushing main branch to github will deploy the maltyst.com

Todo

make double-optin optional (some smtp providers like mxroute won’t like it )
mjml parsing at the email dispatch time. So going away with pre-compilation. This way we can make mjml modifiable and expose in admin. Can probably solve this by implementing mjml api instead and requiring use to provide mjml token.
perhaps add optin captcha? (why with double optin?)
perhaps add optin throttling?

Known hacks

These are issues that I would like to fix but they are limitations on the mautic side.

newpost template - mjml rendering
right now mjml rendering has to happen outside of mautic which is PITA.
Because there is no way to create email as mjml in mautic via api:
https://forum.mautic.org/t/allow-email-created-via-api-to-be-mjml/22257
And Even if you create an mjml segment email in mautic manually - mautic “send to segment” api does not support passing tokens.
see: https://developer.mautic.org/#send-email-to-segment
Which means we must render mjml to thml here so someone needs to maintain mjml server - which is annoying. ☹️☹️☹️
one click unsubscribe headers
While we can use custom unsubscribe links in email body - mautic stil injects a custom mautic one click unsubscribe link.
Which is heavy handed solution and sets email to DNC (do not contanct)s.
I would prefer to just use my own custom links, but this does not seem to be possible.
See details: a) custom header saving bug: https://github.com/mautic/mautic/issues/13387
b) forum issue about DNC: https://forum.mautic.org/t/one-click-unsubscribe-header-full-do-not-contact-is-excessive/34560
need to implement the issue: if List-Unsubscribe is present - dont add mautic option.