This hasn't been an easy task, but I'm finally very happy that we've
gotten rid of all usage instances of `RawSlice` within `engine::ql`.
This is a great feat in terms of codebase cleanup, removing unnecessary
usage of `unsafe` code.
However, this had made lifetimes slightly more complex; for example, we
can no longer directly return from methods that use `&[Token]` since all
returned data is now bound to the same lifetime.
Either way, with some care such issues can be avoided.
Along with this, here's a summary of other changes:
- `RawSlice` now uses `NonNull` to help the compiler with size opts
- The lexer now allows case insensitive keyword usage (I still DO NOT
particularly approve of it, because enforcing is important)
Summary of changes:
- Remaining query parse methods that directly used the `Compiler` were
modified to use token streams instead
- `Entity::parse_from_tokens` to fix assignment to counter instead of
increments
- Allow entity in `drop model`
- `alter model` and `alter space` directly handle space/model names
instead of depending on passing value via args
- Tests added for `drop` and `inspect`
Summary of changes:
- The `drop` queries now use the `DropItem` for drop definitions
- `create model` is now entirely handled by the function in `schema`
- `create space` is now entirely handled by the function in `schema`
- Tests were added for drop (they were never present before)