Restructure docs

README.md

@@ -3,11 +3,3 @@
 [![Dev](https://img.shields.io/badge/docs-dev-blue.svg)](https://common.pages.km3net.de/KM3io.jl/dev)
 [![Build Status](https://git.km3net.de/common/KM3io.jl/badges/main/pipeline.svg)](https://git.km3net.de/common/KM3io.jl/pipelines)
 [![Coverage](https://git.km3net.de/common/KM3io.jl/badges/main/coverage.svg)](https://git.km3net.de/common/KM3io.jl/commits/main)
-
-
-```@index
-```
-
-```@autodocs
-Modules = [KM3io]
-```

docs/make.jl

@@ -5,6 +5,7 @@ makedocs(;
     format=Documenter.HTML(),
     pages=[
         "Home" => "index.md",
+        "API" => "api.md"
     ],
     repo="https://git.km3net.de/common/KM3io.jl/blob/{commit}{path}#L{line}",
     sitename="KM3io.jl",