MINOR: [R] Document Message and MessageReader classes #48651
+26
−4
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Rationale for this change
There are TODOs for documentation which result in https://arrow.apache.org/docs/r/reference/Message.html and https://arrow.apache.org/docs/r/reference/MessageReader.html
What changes are included in this PR?
This PR documents
MessageandMessageReaderclasses.Are these changes tested?
I did not test them as they are documentation changes.
Are there any user-facing changes?
Yes, it fixes the user facing documentation.