Schema parser for Teo schema language

• Separate from the main project
• Rewrite and overhaul
• Schema dumps
• Code diagnostics
• Jump to definition
• Auto completion

• File format
• Trigger auto completions by ".", ":" and "$"
• Auto completion for enum variant literals
• Jump to definition for enum variant literals
• Convert struct objects to primitive types
• Improved callable variant matching mechanics
• Object literal syntax
• Declare enum in type
• Declare object in type

• Rewrite syntax highlight with yaml and precise rules

• Allow doc comment in dictionary literals

• Fix import keyword is unrecognized bug**

• Support Node.js

• Accept indentation settings argument in format
• Add linter config declaration
• Separate fix command and format command
• Expand auto completion candidates for callables into snippets
• Choose completion item from callable variants

• Refactor variable names in place

• diagnostic code

• format lines in a file
• file format arguments