[5/9] feat(brew): create new tool folders for universal brew formulae

[ooloth]

Goal

Create tools/ folders for brew formulae currently managed only via the hand-maintained main Brewfile at tools/homebrew/config/Brewfile. Each new folder makes the tool self-contained and discoverable.

Context

This is issue 5 of 9 in a sequential migration to a single aggregated brew bundle call.

Prerequisite: Complete issue #115 (4/9) first.

Minimum files per tool

For a brew-only tool with no config: Brewfile, utils.bash, install.bash.
Use tools/@new/ as a template. See tools/btop/ or tools/eza/ for minimal examples.

update.bash is not needed — brew updates are handled globally by the aggregated Brewfile generator (issue #119).

Brewfile template

# machine detection — wrap entries in a conditional block to restrict by machine:
#   if computer_name == "Air" ... end
#   if computer_name == "Mini" ... end
#   if ["7385-Y3FH97X-MAC", "MULO-JQ97NW-MBP"].include?(computer_name) ... end
computer_name = `networksetup -getcomputername`.chomp

brew "formula-name"

Checklist

• tools/bats-core/ — brew "bats-core"
• tools/coreutils/ — brew "coreutils"
• tools/git-delta/ — brew "git-delta"
• tools/github-keygen/ — brew "github-keygen"
• tools/goose/ — brew "goose"
• tools/httpie/ — brew "httpie"
• tools/imagemagick/ — brew "imagemagick"
• tools/jq/ — brew "jq"
• tools/kubectx/ — brew "kubectx"
• tools/m-cli/ — brew "m-cli"
• tools/mas/ — brew "mas"
• tools/postgresql/ — brew "postgresql@14"
• tools/speedtest-cli/ — brew "speedtest-cli"

Packages to audit before creating folders

These are likely build subdependencies of other brew packages rather than directly-used tools. If so, they belong in the relevant tool's Brewfile — not as top-level tool folders.

• libpq — PostgreSQL client library; create tools/libpq/ only if used directly (e.g. psql independently of the postgresql formula)
• svn — Subversion; likely pulled in as a build dependency by another formula; verify before creating a folder

Reference

• tools/@new/ — template for a new tool folder
• tools/btop/ — minimal brew-only example
• tools/eza/ — another minimal example (after issue [1/9] feat(brew): replace direct brew calls with Brewfiles in existing tool folders #112 lands)