* added mermaid class diagrammer
contributed from https://github.com/h0lg/netAmermaid - find earlier git history there
* reading from embedded resource instead of file
* swapped out icon to brand diagrammers as an ILSpy product
reusing linked ..\ILSpy\Images\ILSpy.ico from UI project
* added required ilspycmd options and routed call
* adjusted VS Code task to generate model.json required by the JS/CSS/HTML dev loop
* added debug launchSettings
* updated help command output
* using ILSpyX build info in generated diagrammers
removing unused code
* using explicit type where it's not obvious
* outputting in to a folder next to and named after the input assembly + " diagrammer" by default
* renamed diagrammer output to index.html
to support default web server configs in the wild
* improved instructions for creating an off-line diagrammer
* added developer-facing doco for how to edit the HTML/JS/CSS parts
* renamed to remove netAmermaid branding
* updated repo URL and doco link to new Wiki page
* copied over doco
* removed obsolete parts
* moved CLI doco into ILSpyCmd README
* removed end-user facing chapters that go into the Wiki from dev-facing doco
* updated to ilspycmd API and rebranded to ILSpy
* removed doco that's now in https://github.com/icsharpcode/ILSpy/wiki/Diagramming
* added tasks
Holger Schmidt