Refactor naming and crates info (#8)

* Refactor naming and crates info

This commit:
* changes workspace crates to have a `wiggle_` prefix in names
* rename `memory` module of `wiggle-memory` crate to `runtime`
* fixes authors of all crates

* Rename wiggle memory crate to runtime

crates/runtime/src/lib.rs

@@ -0,0 +1,10 @@
+mod borrow;
+mod error;
+mod guest_type;
+mod memory;
+mod region;
+
+pub use error::GuestError;
+pub use guest_type::{GuestErrorType, GuestType, GuestTypeClone, GuestTypeCopy, GuestTypePtr};
+pub use memory::{GuestMemory, GuestPtr, GuestPtrMut, GuestRef, GuestRefMut};
+pub use region::Region;