* intern_pool: add getUnsignedInt
* add an empty struct literal
* resolve array length as usize in comptime interpreter
* use only one global intern pool
* store analysis errors in `DocumentStore.Handle`
* add typed undefined value
* add typed null value
* InternPool: replace untyped values with typed values
* InternPool: remove `indexToTag`
* InternPool: rework representation of optional values
* add representation for unknown values and types
* ComptimeInterpreter: use InternPool typed-values
* ComptimeInterpreter: field access test
* ComptimeInterpreter: improve handling of if expressions
* InternPool: fix typeOf on a comptime float
* ComptimeInterpreter: implement TypeOf with multiple parameters
* run `zig fmt`
* add support for multi object for loops
* add completion tests on multi object for loops
* update minimum zig build version
* use multi object for loops in codebase
* Update tres to latest version
* fix panics when generating document scope on invalid for loops
