[contrib] export a SBOM of dependencies

What :

• Export a Software Bill Of Materials (SBOM) containing all dependencies used by Jami Daemon

Why :

• A SBOM is required to perform CVE analysis and improve security posture of Jami

Who :

• I ( @lmaillard ) will add it

How :

• Add product identification using CPE or PURL in contrib sources
• Add a Make rule to build a SBOM automatically