Enforce maximum message size (RSL1i)

[KacperKluka]

We should implement the spec RSL1i which constrains the maximum size of a message. There are a few things to do:

• set the maxMessageSize default value to 64 KiB (TO3l8)
• allow specifying the maxMessageSize via the ClientOptions
• check if the maxMessageSize is exceeded and throw an appropriate error in case it is

Note: It seems that we have the maxMessageSize in the code already so it should be a good starting point.

┆Issue is synchronized with this Jira Task by Unito