Add documentation for qute support

[angelozerr]

Like we did for vscode microprofile and xml we need to have documentation for showing in action our qute support.

We should have 2 entries

• qute support indsde java file

We must explain that checkedtemplate and template field are supported to manage link with qute template by providing codelens diagnostics and document link.

• qute support inside template file

We have completion for parameter declaration sections and java data model.

We have codelens which shows data model coing from checked template and template field.

We have validation to validate qute template syntax and java data model

We have definition to go to the declared variable to template or to java

We have hover to show java type and doc for redolver

We have linked editing range to update variable

We have higlight to higligt variable and referenced variable . To highlight start ebd sectio