* WIP EE refactor - core classes

* WIP - reorganization

* WIP - eventQueue

* WIP state abstract class to interface

* added states and Pascal case property names

* HandshakeReconnectingState
* EmitStatusInvocation
* HandshakeFailedState

…vingState and ReceiveReconnectState transitions (#173)

* HandshakeStoppedState transitions
* ReceiveStoppedState and ReceiveFailedState transitions
* ReceivingState transitions
* ReceiveReconnectState transitions

* WIP remove abstract from interface, add transition utils

* Simplified the invocations during transitions, added onEntry and onExit transitions, added HandshakingState and UnsubscribedState

* fix

* Switch expression

* WIP

* WIP

* WIP

* Review fixes

* member case

* removed With(null)

* Added UnsubscribeAllEvent to states

* feat: simplified abstraction

* feat: handshake effect handler

* fix: initial retry implementation

* handshake reconnect

* fix: handshake handler

* revert *.csproj changes

* added required info in handshake reconnect invocation.

* receive handler (#180)

* receive handler

* fix: background handlers

* *reconnection configurations *refactor naming

* passing configuration for reconnection

* fix: transition values from receive reconnect

* wip: receive messages

* Revert "Merge remote-tracking branch 'origin/eventengine/handshake-handler' into eventengine/handshake-handler"

This reverts commit be568f7, reversing
changes made to 0da6c9a.

* fix

* ReceivingEffectHandler - ReceivingResponse

* null check

* SubscribeEventEngine - receiveHandler

* *csproj file for RReceivingEffectHandler

* EmitStatus effect handler - take1

* empty task

* wip emit messages

* wip emit messages

* cleanup and unify convention for *emitters

* missing changes emitmessage

* Added publisher

* emitmessages

---------

Co-authored-by: Mohit Tejani <[email protected]>
Co-authored-by: Pandu Masabathula <[email protected]>

* wip: effects abstraction overhaul

* fix: added comments

* unit test cases for all subscribe state transtiions

* StateTransitions - Tests - WIP

* refactor handshake unit tests

* HandshakeFailedState tests

* HandshakeStopped tests

* ReceivingState tests

* ReceiveReconnectingState tests

* ReceiveReconnectingState - more tests

* ReceiveFaileState and ReceiveStoppedState

* Any UnsubscribeEvent tests

* Separated tests to individual states

* HandshakingState emit status

* invocations and refactor

* Refactored HandshakeFailedStateTransition

* take-1: integration

* HandshakeReconnecting HandshakeStopped state transitions refactor

* HandshakingStateTransition refactor

* listeners

* ReceiveFailedStateTransition refactor

* refactored remaining transitions

* fix: emitters

* moved subscribe event engine initialisation to subscribeOpertaion

* manager response object  - WIP

* ee integration changes

* merge remianing changes

* expose unsubscribeAll

* manager wip

---------

Co-authored-by: Pandu Masabathula <[email protected]>