[Bug] Dev scope issues

[SSlinky]

Describe the bug

• Parsing a document a second time causes its names to be duplicated in the scope rather than cleaned properly.
• The name "Unknown Module" shouldn't generate a conflict with anything as it's not actually a name. Unnamed things need to have some kind of flag to avoid this. Simplest thing may be to use an "invalid scope" flag and dump it before building.
• Name conflicts between modules should only warn as they are actually valid. Module1.Foo will not conflict with Module2.foo. They should generate an ambiguous name error when referenced without being fully qualified from a third module. When called in the same scope, they resolve correctly.

To Reproduce
Steps to reproduce the behavior:
Click around some different documents to get them to parse.

Screenshots
If applicable, add screenshots to help explain your problem.

[SSlinky]

Not really a bug since it's dev branch but simpler for me to document it here.