docs: Add cloud.d directory contents section to claim README (#21966)
* docs: Add cloud.d directory contents section to claim README This commit adds a comprehensive inventory section describing the contents of the cloud.d directory: - cloud.conf: Cloud configuration with claimed_id - private.pem: RSA private key for ACLK authentication - public.pem: RSA public key for ACLK authentication - claimed_id: File storing the claimed ID UUID The section includes a note clarifying the distinction between claimed_id and Machine GUID, and cross-references the Node Identities documentation for detailed identity explanations. * Apply suggestion from @Ancairon * Potential fix for pull request finding Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> * Potential fix for pull request finding Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> --------- Co-authored-by: nedi-audit <nedi-audit@netdata.io> Co-authored-by: Fotis Voutsas <fotis@netdata.cloud> Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>