Resolve variables at parse time (#1429)

This replaces `ResolveVariableNode` and `ResolveMethodNode` with their resolution.
When we build the truffle node tree, we determine whether names resolve to:

* lexical scope
* base module
* implicit this

Then, we use this information to directly construct the underlying nodes (`ReadPropertyNode`, `ReadLocalPropertyNode`, etc).

Additionally, `AstBuilder` determines whether the property access must be const or not.

This introduces a `BaseModuleMembers` registry, which gets generated as part of Java compilation.

docs/modules/style-guide/pages/index.adoc

@@ -193,7 +193,7 @@ Too many lines separate `foo` and `baz`.
 Properties that override an existing property shouldn't have doc comments nor type annotations,
 unless the type is intentionally overridden via `extends`.
 
-[source%tested,{pkl}]
+[source%parsed,{pkl}]
 ----
 amends "myOtherModule.pkl"