[ENG] Plugins documentation

The following collection includes our proprietary solutions and platforms that work with us (have Courier and Parcel® services)

Plugins:

https://dokumentacja-inpost.atlassian.net/wiki/spaces/PL/pages/89587713

https://dokumentacja-inpost.atlassian.net/wiki/spaces/PL/pages/89620481

https://dokumentacja-inpost.atlassian.net/wiki/spaces/PL/pages/61702175

https://dokumentacja-inpost.atlassian.net/wiki/spaces/PL/pages/175177729

https://dokumentacja-inpost.atlassian.net/wiki/spaces/PL/pages/294518785

https://dokumentacja-inpost.atlassian.net/wiki/spaces/PL/pages/126582785