Websocket - Add events (OnConnect / OnDisconnect)

[Apolixit]

Linked to #83

[Apolixit]

@RostislavLitovkin, based on your issue, I have added OnConnect and OnDisconnect, but I didn't implemented the others because I think it is better if it is handle by the caller (maybe some apps doesn't want auto-reconnect)

You can try this PR on your app before to merge if you prefer ;)

[sonarqubecloud[bot]]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[sonarqubecloud[bot]]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud