Fixup documentation

- better gomarkdown generation that now fixed the escaped strings, no
  need to use pandoc anymore
- added workflow image
- upgraded versions of mkdocs requirements

doc/docs/packages/generator/extrafiles.md

@@ -2,27 +2,27 @@
 
 # extrafiles
 
-``` go
+```go
 import "katenary/generator/extrafiles"
 ```
 
-extrafiles package provides function to generate the Chart files that
-are not objects. Like README.md and notes.txt…
+extrafiles package provides function to generate the Chart files that are not objects. Like README.md and notes.txt...
 
-## func NotesFile
+## func [NotesFile](<https://github.com/metal3d/katenary/blob/develop/generator/extrafiles/notes.go#L9>)
 
-``` go
+```go
 func NotesFile() string
 ```
 
 NoteTXTFile returns the content of the note.txt file.
 
-## func ReadMeFile
+<a name="ReadMeFile"></a>
+## func [ReadMeFile](<https://github.com/metal3d/katenary/blob/develop/generator/extrafiles/readme.go#L25>)
 
-``` go
+```go
 func ReadMeFile(charname, description string, values map[string]any) string
 ```
 
 ReadMeFile returns the content of the README.md file.
 
-Generated by [gomarkdoc](https://github.com/princjef/gomarkdoc)
+Generated by [gomarkdoc](<https://github.com/princjef/gomarkdoc>)