Refactor completion commands

[cecheta]

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[Copilot]

Pull request overview

Refactors the per-command completion blocks in install.sh into a single data-driven loop that iterates over a list of commands and dispatches to a generate_completion() function. Also switches the script from /bin/sh to Bash with set -euo pipefail.

Changes:

• Replaced five repetitive if command -v ... blocks with a cmds array and a shared loop.
• Added a generate_completion() function with a case statement mapping each command to its zsh-completion invocation.
• Switched shebang to #!/usr/bin/env bash and enabled set -euo pipefail; added an explicit mkdir -p for the site-functions directory.

Show a summary per file

File	Description
install.sh	Consolidates completion generation into an array + loop + case dispatch and hardens shell options.

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• Files reviewed: 1/1 changed files
• Comments generated: 2

[Copilot]

Copilot's findings

• Files reviewed: 1/1 changed files
• Comments generated: 0 new