Remove Fetch from CrossLinkResolver, enforce eager fetching of crosslinks
#1784
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Fetchfrom CrossLinkResolver, enforce eager fetching of crosslinks.By removing
FetchfromICrossLinkResolverand enforcing it takes aFetchedCrossLinksdirectly and not aICrossLinkFetcherinstance, we enforce instances ofICrossLinkResolverhave immediate access to resolve.This removes a hidden requirement that
Fetch()needed to be called beforeTryResolve()was usable. It also removes a hidden requirement thatDocumentationSetwas unusable beforeDocumentationGeneratorcalledFetch()on its publicICrossLinkResolverproperty.This PR untangles that making
DocumentationSetimmediately useable after construction.This allows us to build a clean resolved navigation and emit errors/warnings as we build it.
Removing the need to do an asynchronous touchups after construction.
This also allows us to trust the crosslinks are valid as defined on
CrossLinkReferenceand that the urls are valid onCrossLinkNavigationItem.Uncovered two more places where
CrossLinkNavigationItemwas not handled, updating navigation index and parent as part ofGlobalNavigationas part of the assembler build.