fix: Set previousLocalPlayer null in NI.Reset (MirrorNetworking#2993)

Calling RemovePlayerForConnection followed by AddPlayerForConnection with the same player object fails to call OnStartLocalPlayer again because previousLocalPlayer was't properly reset to null.

fix: networkmanager undo and move some validation into Reset() (Mirro…

…rNetworking#2990)

* Fix network manager undo and move some validation code into Reset()

* Add comments

fix: SendChangeOwnerMessage robustness

- Check netid == 0
- Check conn is observing the identity

Fixes MirrorNetworking#2988

feat: Add rotation to NTv2 teleport (MirrorNetworking#2986)

* feat: Add rotation to NTv2 teleport

* Updated script template

* Forgot Cmd/Rpc can't do overloads...fixed

* overload OnTeleport

* updated comments

fix: Added HashSet for disconnecting connections (MirrorNetworking#2981)

* fix: Added HashSet for disconnecting connections

* fixed code smells

feat: Added Network Transform Script Template

fix: Network Room Manager Update

- Deprecated Network Connection param from client overrides
- Use NetworkClient.connection instead
- Script Template updated

fix: Check NetworkServer.active in DestroyObject (MirrorNetworking#2982)

* fix: Check NetworkServer.active in DestroyObject
- Fixes MirrorNetworking#2977

* Update Assets/Mirror/Runtime/NetworkServer.cs

Co-authored-by: vis2k <info@noobtuts.com>

feature: SyncVar<T> (MirrorNetworking#2951)

* feature: SyncVar<T>

* remove unused import

* SyncVarNetworkBehaviour<T> to support explicit hooks of <T> and to prepare for Weaver [SyncVar] internal replacement

* only call hook on client for compatibility with original [SyncVar]

* show SyncVar<T> label to make it obvious what type it is. useful to distinguish weaver replacements later

feat: Added Custom Interest Management script template