### Summary
* Removes old gump packet support
* Removes support for v4 clients
* Removes `Unpack` flag and assumes it is always true.
* Removes StringToBuffer since this is built into .NET now.
> [!Note]
> View the file changes with white space off: https://github.com/modernuo/ModernUO/pull/1739/files?diff=split&w=1
Changes gump compilation to use string interpolation. .NET 6 uses code generation and compile time tricks to speed up string interpolation between 15 and 30% and reduce allocations dramatically.
* Optimizes OrderedHashSet using the learnings here: https://github.com/dotnet/runtime/issues/10050
* Removes ValueCollection since it was a relic from the conversion of the OrderedDictionary
* Centralizes throw strings.
* Adds pooled ordered hash set (but doesn't use it)
Closes#448
- [X] Caches DateTime.NowUtc on the game loop (not other threads)
- [X] Replaces all locations where it makes sense
- [X] Adds Min/Max for `IComparable` (TimeSpan, DateTimes, etc)
Closes#261
- [X] Converts boat packets
- [X] Makes a packet container builder for packet 0xF7
- [X] Generalizes world item packet so it works for mobiles too
Notes:
- This PR doesn't address proper smooth movement for boats.
- [X] Converts targeting packets.
### BREAKING CHANGE TO TARGET CLASS
```cs
public virtual Packet GetPacketFor(NetState ns)
```
Changed to:
```cs
public virtual void SendPacketTo(NetState ns)
```
Bumps release version
