docs: add missing order methods documentation

[BeeMargarida]

-	-
Issue	https://github.com/ripe-tech/ripe-sdk/pull/329/files/c11f261d7d5d3b9ccf74aaefe4379967c2fbed28#r758316960
Dependencies	--
Decisions	Added missing documentation for order methods.
Animated GIF	--

[ripe-tobias-bot[bot]]

Woof, Woof!

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