Migration of the documentation and website to MkDocs

[jponge]

No description provided.

[jponge]

A few screenshots

[jponge]

Note: I've had to make changes to the CI/CD, it will be interesting to test it on a 2.0.0-M1 milestone release 😇

[jponge]

It's all ready for review.

I know, it's not a small pull-request 🤣

[codecov]

Codecov Report

Merging #980 (359b451) into main (ccebead) will increase coverage by 0.05%.
The diff coverage is n/a.

❗ Current head 359b451 differs from pull request most recent head 1a0acc5. Consider uploading reports for the commit 1a0acc5 to get more accurate results

@@             Coverage Diff              @@
##               main     #980      +/-   ##
============================================
+ Coverage     89.03%   89.09%   +0.05%     
  Complexity     3138     3138              
============================================
  Files           412      412              
  Lines         12585    12585              
  Branches       1595     1595              
============================================
+ Hits          11205    11212       +7     
+ Misses          730      728       -2     
+ Partials        650      645       -5     

Impacted Files	Coverage Δ
...operators/multi/builders/CollectionBasedMulti.java	93.54% <0.00%> (-3.23%)	⬇️
...java/io/smallrye/mutiny/helpers/Subscriptions.java	79.00% <0.00%> (-2.77%)	⬇️
.../io/smallrye/mutiny/helpers/queues/DrainUtils.java	77.77% <0.00%> (-2.23%)	⬇️
...erators/multi/builders/BufferItemMultiEmitter.java	90.78% <0.00%> (-1.32%)	⬇️
...erators/multi/builders/SerializedMultiEmitter.java	79.26% <0.00%> (-1.22%)	⬇️
...mallrye/mutiny/operators/multi/MultiFlatMapOp.java	84.80% <0.00%> (-0.61%)	⬇️
...io/smallrye/mutiny/operators/uni/UniMemoizeOp.java	91.26% <0.00%> (ø)
...perators/multi/processors/SerializedProcessor.java	87.12% <0.00%> (ø)
...allrye/mutiny/operators/uni/UniAndCombination.java	90.19% <0.00%> (+1.96%)	⬆️
...subscription/SwitchableSubscriptionSubscriber.java	97.60% <0.00%> (+2.39%)	⬆️
... and 3 more

[jponge]

I've merged without waiting for @heubeck, it's a big one anyway.