Added possibility to send chat messages to personal chats / group / meeting chats

[MathijsVerbeeck]

Added the "IMe" interface to query the user details and list the user chats
Added possibility to create a new OneOnOne or Group chat
Added possibility to send messages to a personal OneOnOne chat, Group chat or meeting chat

Issue ref: #657

[MathijsVerbeeck]

In case of wanting to run the tests in "ChatTests.cs", you'll have to make sure to replace the values in "ChatTests.cs" at line 19 & 20

private readonly string UserId1 = "a857e888-b602-4790-86d9-3dca2109449e"; private readonly string UserId2 = "8323f7fe-e8a4-46c4-b5ea-f4864887d160";

to userIds existing in your Azure AD Environment.

Also you'll have to make sure that a meeting chat is available for the user or the tests for the meetings in "ChatMessageTests.cs" will fail.

[jansenbe]

Wow! Nice job again @MathijsVerbeeck , congrats for delivering this one so fast! I'll process this one in the week of the 19th as I'm OOF next week. Maybe I can even process before, but just setting expectations on the possible delay.

[jansenbe]

@MathijsVerbeeck : took a while, but finally cleaned up my vacation backlog and can spent some time on this one :-)

[MathijsVerbeeck]

@jansenbe No rush. I'm currently having a busy period at work/real life as well :-)