add documentation for app operation and display functions #695

Job	Run time
Call Ledger guidelines_enforcer / Retrieve application metadata / Retrieve application metadata	4s
Call Ledger guidelines_enforcer / Get workflow version / Get workflow version	7s
Call Ledger guidelines_enforcer / Dispatch check	0s
Call Ledger guidelines_enforcer / Dispatch check / Clang Static Analyzer (nanosp)	2m 0s
Call Ledger guidelines_enforcer / Dispatch check / Clang Static Analyzer (nanos)	1m 31s
Call Ledger guidelines_enforcer / Dispatch check / Clang Static Analyzer (nanox)	1m 37s
Call Ledger guidelines_enforcer / Dispatch check / Clang Static Analyzer (stax)	1m 56s
Call Ledger guidelines_enforcer / Dump app information / Get application manifest for supported devices (nanosp)	1m 18s
Call Ledger guidelines_enforcer / Dump app information / Get application manifest for supported devices (nanos)	1m 16s
Call Ledger guidelines_enforcer / Dump app information / Get application manifest for supported devices (nanox)	1m 18s
Call Ledger guidelines_enforcer / Dump app information / Get application manifest for supported devices (stax)	1m 20s
Call Ledger guidelines_enforcer / Dispatch check / Check readme	4s
Call Ledger guidelines_enforcer / Dispatch check / Check APP_LOAD_PARAMS	3s
Call Ledger guidelines_enforcer / Dispatch check / Check Makefile	7s
Call Ledger guidelines_enforcer / Dispatch check / Check icons	8s
	12m 49s

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