DOC-4232 stream code examples (#3128)

* DOC-4232 added first stream example

* DOC-4232 examples up to xadd_7

* DOC-4232 examples up to xread

* DOC-4232 examples up to xclaim

* DOC-4232 added remaining examples

* DOC-4232 more fixes

* DOC-4232 fix for test fail on CI build

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Co-authored-by: Vladyslav Vildanov <[email protected]>

Author: andy-stark-redis