WIP: Replace AkkaParadoxPlugin with PekkoParadoxPlugin

[reypader]

Fixes #11

[reypader]

Base template applies but subpages lose the pekko logo and the header is blue. Still trying to figure out why

[pjfanning]

you need to copy paste all of this

https://github.com/apache/incubator-pekko/blob/main/project/plugins.sbt#L39-L47

[pjfanning]

@reypader applying this is actually hard. I didn't raise this and expect you to do it. Someone who has done it before will find this much easier. As well as the plugin.sbt issue I already raised, there are quite a lot of settings in incubator-pekko project/Paradox.scala that need to be copied over - the pekkoThemeSettings and those settings need to be wired into the project settings.

I can have a look at this myself in a few days.

[reypader]

@pjfanning thanks for the heads up! I'll close this ticket now. Looking at it upfront, it seemed easy enough 😆 .

...there are quite a lot of settings in incubator-pekko project/Paradox.scala that need to be copied over - the pekkoThemeSettings and those settings need to be wired into the project settings

I was actually staring at this class as well and half considered copying it over!