Revive terminal dotfiles setup

[ma08]

Summary

• Replace the old destructive install.sh path with a safe dry-run-first setup.sh with scoped profiles for music, editor, ranger, and GitUI.
• Add macOS MPD/ncmpcpp setup for /Users/sourya4/pro/youtube_download/music, including visualizer FIFO support and a Hammerspoon media-key bridge.
• Add a baseline Neovim/Vim setup with CodeCompanion Codex ACP chat, Azure OpenAI gpt-5.5 inline editing, CodeCompanion keymaps, git-commit drafting, and an AI request statusline.
• Add portable ranger clipboard integration.
• Add GitUI as a dotfiles-owned terminal Git tool with repo-backed vim keybindings and a wrapper that avoids the zsh AUTO_CD command/directory collision.
• Rewrite the README around the revived v1 scope and preserve old Linux desktop material as historical-only.

Validation

• bash -n setup.sh install.sh bin/dotfiles-clipboard-copy bin/dotfiles-gitui
• git diff --check origin/master...HEAD
• ./setup.sh --all --install-packages dry run
• Applied on sourya-mac with ./setup.sh --all --install-packages --apply
• Verified MPD indexed 196 tracks and reached [playing] state in a muted mpc smoke test, then stopped and cleared playback
• Verified ncmpcpp browser navigation no longer crashes after the local patched/pinned libmpdclient fix on sourya-mac
• Verified ncmpcpp visualizer output and Hammerspoon media-key bridge on sourya-mac
• Verified Neovim loaded CodeCompanion headlessly on Mac and VM
• Verified Azure Responses API inline editing through gpt-5.5
• Verified CodeCompanion keymaps and statusline event handling headlessly
• Verified GitUI setup on Mac and VM, including keymap symlinks and startup/keymap parsing
• Verified gitui --version leaves cwd unchanged on Mac after moving keymaps under config/gitui/ and adding bin/dotfiles-gitui
• GitHub reports no checks configured for this PR branch

Notes

• The local sourya-mac libmpdclient 2.25_1 tap remains pinned until Homebrew or upstream ships the null RealUri fix; rerun the saved repro before unpinning.
• Old i3/polybar/Vimperator/Xresources/Vim bundle material remains preserved but not revived by default.
• A related botfiles change updated cross-machine shell bootstrap/editor defaults; that lives outside this dotfiles PR.

Written by Codex via the developer's authenticated GitHub account.