Migrate GA to Plausible cookieless solution

[okynos]

Hello!

We want to remove tracking cookies that disturb our visitors. We will include Open Source solution like Plausible, in addition it´s cookieless.

[okynos]

Added Plausible integration in 63ae993

Now we will left some days to retrieve enough information to disable GA.

[okynos]

Same integration added to achiefs.com, commit Achiefs/achiefs.github.io@b1a44bc