[pjungermann]

What changes

• Set settings.node.corepack = true in dot_config/mise/config.toml so mise runs corepack enable itself after installing any Node version that ships Corepack.
• Remove brew "corepack" from the Brewfile — the safety-net install added in fix: install corepack via Homebrew so step 8 can find it #92 is no longer needed.
• Drop the standalone corepack enable call from bin/install-software.sh step 8. The shim is already live by the time this step runs, right after mise install.
• Keep corepack install -g yarn@stable so Yarn remains eagerly provisioned; per-project pinning via packageManager is unchanged.

Why

mise's Node plugin natively supports the Corepack lifecycle hook, which fits the repo's AGENTS.md rule mise > brew > mas: migrate up when a mise plugin exists. One fewer brew formula, one fewer manual step in the install script, and the same end state.

Verification

Shellcheck clean on bin/install-software.sh. Full install-on-fresh-mac flow not re-run in this change; the behaviour is attested by mise's docs rather than observed here.

Ref: https://mise.jdx.dev/lang/node.html#corepack
Relates-to: #92

[github-actions]

✅MegaLinter analysis: Success

Descriptor	Linter	Files	Fixed	Errors	Max errors	Warnings	Elapsed time
✅ BASH	bash-exec	1		0		0	0.66s
✅ BASH	shellcheck	1		0		0	0.72s
✅ COPYPASTE	jscpd	yes		no		no	0.91s
✅ REPOSITORY	git_diff	yes		no		no	0.01s
✅ SPELL	cspell	3		0		0	2.3s

See detailed reports in MegaLinter artifacts
Set VALIDATE_ALL_CODEBASE: true in mega-linter.yml to validate all sources, not only the diff

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