feat(core): Added DenseSet and StringSet types (#268)

* feat(core): Added DenseSet & StringSet types with docs

- Improved documentation by adding labels to chain types & pointer tagging table
- Added potential improvements to the DenseSet types in the docs
- Added excalidraw save file for future editing
- Removed ambiguous overloading types
- Renamed iterators to be more clear


* feat(core): Cleaned up DenseSet and Docs
* feat(core): Made DenseSet more ergonomic
* feat(server): Integration of DenseSet into Server

- Integrated DenseSet with CompactObj and the Set Family commands

Signed-off-by: Braydn <braydn.moore@uwaterloo.ca>

src/server/rdb_test.cc

@@ -30,6 +30,7 @@ using absl::StrCat;
 
 ABSL_DECLARE_FLAG(int32, list_compress_depth);
 ABSL_DECLARE_FLAG(int32, list_max_listpack_size);
+ABSL_DECLARE_FLAG(bool, use_set2);
 
 namespace dfly {
 
@@ -37,6 +38,11 @@ class RdbTest : public BaseFamilyTest {
  protected:
  protected:
   io::FileSource GetSource(string name);
+
+  // disable usage of DenseSet until the RDB patches are added
+  RdbTest() : BaseFamilyTest() {
+    SetFlag(&FLAGS_use_set2, false);
+  }
 };
 
 inline const uint8_t* to_byte(const void* s) {