Implement web-editor example and integrations

[beikov]

I'd like to provide a full tutorial and example application with some out of the box integrations for a web-editor support based on a custom integration with the Monaco editor from Microsoft.

A few of the features(https://makecode.com/js/editor) that I'd like to adopt

• [x] Syntax highlighting(improve coloring, formatting i.e. fat?)
• [x] Auto suggestion of identifiers and keywords. Respect camel case such that s suggests clearScreen => The monaco editor does that already
• [x] Function parameter info suggestion
• [x] Function hover support
• [x] Identifier information e.g. type name/function signature + documentation
• [x] Put cursor into parenthesis when autocompleting a function
• [x] Bracket matching
• [x] Syntax validation
• [x] Semantic validation(needs more type checking i.e. function arguments, operator resolvers shouldn't accept all types)
• [x] Make use of https://github.com/Blazebit/blaze-domain/issues/11
• [x] Single-Line mode https://github.com/microsoft/monaco-editor/issues/1601

It would also be cool if we could implement somekind of server side support through an LSP implementation via e.g. Xtext: https://www.eclipse.org/Xtext/documentation/330_web_support.html