feat(sdk): custom assertions #1292

Job	Run time
Validate PR title	5s
mavenverify	3m 32s
platform-integration	5m 54s
platform-xtest / resolve-versions	12s
platform-xtest / xct (main, java)	27m 48s
platform-xtest / xct (v0.4.34, js)	10m 16s
platform-xtest / xct (main, js)	17m 57s
platform-xtest / xct (v0.4.34, go)	10m 19s
platform-xtest / xct (main, go)	19m 50s
platform-xtest / xct (v0.4.34, java)	13m 35s
platform-xtest / xtest	4s
platform-xtest / publish-results	4s
ci	2s
	1h 49m 38s

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