docs: wipe all documentation for clean reference-docs rewrite (#168) #215

Job	Run time
SBOM (SPDX + CycloneDX)	17s
Gitleaks (secret scan)	13s
jscpd (duplication < 3% on touched code)	13s
OSV-Scanner (SCA)	6s
Semgrep (SAST)	21s
Trivy (filesystem + container scan)	14s
	1m 24s

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