Release v1.4.0

[YASoftwareDev]

Summary

• Adds Dockerfile.nosudo with two parameterized no-sudo test variants (nosudo-auto / nosudo-forced)
• Expands CI matrix from 12 to 15 combinations (3 Ubuntu × 2 nosudo variants + existing 9 regular)
• Comprehensive test.sh coverage improvements: strict check_local_bin, critical nosudo-forced fix, added delta/jq/python3 to core section, tmux plugin dir checks
• Renames test-local.sh → ci-local.sh with full nosudo pipeline (install → test → idempotency → update → re-test)
• Removes dead tmux plugins (tmux-resurrect, tmux-continuum) from installer
• Multiple robustness fixes: --nosudo CLI flag for curl-pipe usage, _gh_release_info for all no-sudo asset URLs, error propagation in _download_tar_bin, oh-my-zsh installer failure guard, cheat URL pattern fix

Test plan

• CI matrix passes all 15 combinations (9 regular + 6 nosudo)
• nosudo-auto: no sudo binary present, all 7 binaries land in ~/.local/bin
• nosudo-forced: sudo present but NOSUDO=1 overrides, all 7 binaries land in ~/.local/bin
• test.sh nosudo strict check_local_bin rejects system-path binaries
• curl ... | bash -s -- --nosudo minimal works end-to-end

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