The feedback form relies on instance SMTP being configured, which
MapleDeploy customers won't do. Without SMTP it silently logs to
the server and shows a misleading success message. Removed the
navbar button, onboarding modal, subscription page link, API
endpoint, and all associated dead code.
Replace Coolify branding with MapleDeploy throughout the UI: logos,
favicon, fonts (Overlock 900), color scheme, help links, and page
titles. Remove GitHub Actions workflows and add Forgejo CI build
workflow. Strip cloud-only features (subscription prompts, sponsor
links, server creation cloud options).
