Align repo purpose and reader language

[keepittechie]

Summary

• Audited the repo purpose and navigation
• Removed remaining video/content-planning framing
• Clarified the repo as a public-safe homelab documentation and replication resource
• Normalized wording from viewer-focused language to reader-focused documentation language
• Lightly cleaned release/process wording
• Checked guide, service, example, diagram, and navigation docs for purpose alignment

Safety Review

• Markdown link check passed
• Diagram structure check passed
• Public-safety scan passed
• git diff --check passed
• Old episode/video framing scan returned clean
• Private domain scan returned clean
• Personal path/email scan returned clean
• Private-language scan returned clean
• No screenshots, exact host IPs, private domains, raw exports, credentials, or private data were added

Notes

This keeps the repo focused on showing the homelab setup and helping readers safely build something similar.