feat(helpcentre): Implement comprehensive Help Centre with search, FAQs, and support channels #195

Job	Run time
Security & Code Quality	1m 18s
Test Suite	56s
Build & Performance	4m 2s
Database Tests	1m 1s
Enhanced Security Testing	4m 39s
Deploy to Staging	0s
Performance Monitoring (Staging)	0s
Deploy to Production	0s
Rollback on Failure	0s
Performance Monitoring	0s
	11m 56s

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