* feat: 'delete' interface (deciding whether a type is managed or not)
* refactor: Move implements function to Interface module
* feat: Automatically implement 'delete' for types defined with `deftype`
* fix: Don't implement `delete` for Pointer
* refactor: Clarify `memberInfo` function
* fix: Also check if function types are managed
* fix: Implement 'delete' for String and StaticArray.
* fix: Manage String and Pattern. Tests run!
* feat: Add `managed?` primitive
* docs: Note about primitiveIsManaged
* test: Basic test cases for managed / nonmanaged external types
* test: Make sure `managed?` primitive works
* test: Inactivate sanitizer since we're creating leaks intentionally
* feat: Removed 'isExternalType' function
* refactor: Decide if struct member takes ref or not when printing
..based on blitable interface, and 'prn' implemntation
* refactor: Use 'blit' everywhere
* refactor: Implement `strTakesRefOrNot` in terms of `memberStrCallingConvention`
* refactor: Use `remove` over `filter not`
