- interface conversion only waits for type resolution of modports
- typeof conversion resolves struct field accesses
- logic conversion only converts logic data declarations
- struct conversion only converts within modules
- fix nested type traversal order causing premature struct conversion

- modports can use complex expressions
- update interface_infer test for consistency across simulators
- fix interface inlining of implicitly typed data declarations

- fix position modport-to-modport bindings
- inout logics converted to regs become outputs

- also fixes an issue where system tasks were inadvertently prefixed
  during the interface conversion

- Trace comments cover module items, decls, and stmts
- Added pseudo-lexer to Alex parser for monadic Position production
- Added Position to every DeclToken
- Removed Comment PackageItem
- Added CommentStmt and CommentDecl
- Fixed traversal skipping outer MIAttr ModuleItems
- Generally cleaned up Parser modules

- NestTF refactored to cover all package items
- fixed issue where type traverse skipped typedefs

- generally cleaned up and documented the Logic conversion
- made exprToLHS a shared helper function, now uses Maybe
- ported existing local exprToLHS helpers to the new one

- convert default pattern used to fill a vector
- convert Logic in parameter and localparam types
- interface conversion should happen early for type resolution later on
- interface conversion handles renaming of usages of inlined decls