feat: Add Linux support to terminal setup scripts

[dmythro]

• Updated README.md to reflect Linux compatibility and installation instructions.
• Modified setup-terminal.sh to detect OS and install packages using apt for Linux.
• Enhanced reset-terminal.sh to support package uninstallation on Linux.
• Introduced a new TODO-Linux.md file outlining the plan for Linux support.
• Adjusted clipboard handling in tmux configuration for cross-platform compatibility.
• Made .zshrc configuration cross-platform by checking paths at runtime.
• Updated font installation instructions for Linux users.
• Ensured that macOS-specific features are conditionally executed.

[Copilot]

Pull request overview

Adds Ubuntu/Debian (apt-based) Linux support to the terminal setup/reset scripts while keeping macOS behavior intact, and updates docs to reflect cross-platform usage.

Changes:

• Add OS detection + Linux package installation paths (apt, curl installers, git clone) to setup-terminal.sh.
• Extend reset-terminal.sh to optionally uninstall Linux-installed components and conditionally skip macOS-only steps.
• Update documentation (README.md, AGENTS.md) and add a Linux-support plan (TODO-Linux.md).

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
setup-terminal.sh	Detect OS and install core/dev tooling via brew (macOS) or apt/curl/git (Linux); update tmux/zsh config for cross-platform clipboard and plugin paths.
reset-terminal.sh	Add OS detection; conditionally reset macOS Terminal profile; add Linux uninstall flow for apt + cloned assets.
README.md	Update messaging/instructions and font guidance to include Linux (apt + manual font install notes).
AGENTS.md	Document cross-platform script structure (OS detection, sed_inplace, placeholders, Linux install/uninstall behavior).
TODO-Linux.md	Add an implementation plan and validation checklist for Linux support.

Comments suppressed due to low confidence (1)

setup-terminal.sh:299

• On Ubuntu/Debian the package fd-find installs the fdfind binary (not fd). Since FZF_ALT_C_COMMAND is set before the later alias fd='fdfind', this condition won’t be true and fzf won’t use fd for directory search. Update the logic to also detect fdfind (or define the alias earlier) so Linux gets the intended fast path.

# Use ripgrep/fd with fzf if available
command -v rg &>/dev/null && export FZF_DEFAULT_COMMAND='rg --files --hidden --glob "!.git"'
command -v fd &>/dev/null && export FZF_ALT_C_COMMAND='fd --type d --hidden --exclude .git'

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[Copilot]

On Linux, this clones into /.zsh/zsh-completions but the parent directory (/.zsh) may not exist on a fresh machine, causing git clone to fail with “No such file or directory”. Create the parent directory first (e.g., mkdir -p "$HOME/.zsh") before cloning.

Suggested change

	if [[ ! -d "$HOME/.zsh/zsh-completions" ]]; then
	if [[ ! -d "$HOME/.zsh/zsh-completions" ]]; then
	mkdir -p "$HOME/.zsh"

[Copilot]

This section runs git clone on Linux without ensuring git is installed. On minimal Ubuntu/Debian installs, git may be missing, which will abort the script under set -e. Consider adding git to the apt install list (or installing it only when needed) before cloning zsh-completions.

[Copilot]

The Linux setup adds the GitHub CLI apt repository and keyring, but the reset script’s Linux uninstall path doesn’t remove those system-level files. To fully undo setup, also delete /etc/apt/sources.list.d/github-cli.list and /etc/apt/keyrings/githubcli-archive-keyring.gpg (and run apt update) when uninstalling.

Suggested change

	fi
	fi
	# Remove GitHub CLI apt repository and keyring added by setup-terminal.sh
	GH_CLI_LIST="/etc/apt/sources.list.d/github-cli.list"
	GH_CLI_KEYRING="/etc/apt/keyrings/githubcli-archive-keyring.gpg"
	GH_CLI_CHANGED=false
	if [[ -f "$GH_CLI_LIST" ]]; then
	echo " Removing GitHub CLI apt source list ($GH_CLI_LIST)..."
	sudo rm -f "$GH_CLI_LIST" 2>/dev/null || true
	GH_CLI_CHANGED=true
	fi
	if [[ -f "$GH_CLI_KEYRING" ]]; then
	echo " Removing GitHub CLI apt keyring ($GH_CLI_KEYRING)..."
	sudo rm -f "$GH_CLI_KEYRING" 2>/dev/null || true
	GH_CLI_CHANGED=true
	fi
	if [[ "$GH_CLI_CHANGED" == true ]]; then
	echo " Updating apt package index after removing GitHub CLI repository..."
	sudo apt update 2>/dev/null || true
	fi