chore: bump version to v1.4.1

chore: update GitHub username from agomusio to samboland

docs: remove released tags from changelog entries

docs: update changelog with post-1.4.0 changes

feat: add Markdown Mermaid extension to devcontainer

docs: add BMAD Method to acknowledgements

chore: bump version to v1.4.0

docs: update changelog with Dockerfile consolidation and trust fix

fix: pre-accept workspace trust to eliminate startup prompt

perf: consolidate Dockerfile RUN commands (25 → 7)

fix: add trailing newline to all nmc-update exit paths

docs: add save-config to shell shortcuts, reorder table

feat: add Bun, Redis CLI (build-time) + Rust, Go, Deno (opt-in SDKs)

docs: update unreleased changelog with pnpm/yarn and credential fix

feat: add pnpm and yarn to container via corepack