Auxiliary : Scanner

[Ed94]

Should be a generalized solution for Scanning files into an AST in various ways.

The rough way for simple "component" files (as used in this library) is to just scan the file and store the content as an untyped_str AST.
Great to do manual #include injection. This should not be the default behavior though.

A more proper way (for validation) is to generate an ast from the content using parse_global_body. From there if requests are provided to the scanner, it sifts through the AST to fulfill the requests. If no requests are provided it should just parse and thus generate the AST as the result.

The scanner at minimum to find all identifiers in execution scope would need to keep track of hashed keywords in a namespace group (global, namespaced, class/struct scope, etc).

[Ed94]

I'm reducing the scope to just be a simple way to scan a file.

The only features that matter is to strip specific directives from a file (include, pragmas).
Even that can technically be handled by the AST received after scanning the file...