ci(release): 🚀 harden AUR publishing

[thorstenfoltz]

• 🔁 Consolidate AUR publishing into one reusable flow for both packages.
• 🛡️ Retry transient AUR clone failures to reduce flaky release runs.
• ✅ Skip publishing cleanly when package files are already up to date.

[github-actions]

✅MegaLinter analysis: Success

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
✅ BASH	bash-exec	5		0	0	0.01s
✅ BASH	shellcheck	5		0	0	0.17s
✅ BASH	shfmt	5		0	0	0.01s
✅ DOCKERFILE	hadolint	1		0	0	0.07s
✅ JSON	jsonlint	4		0	0	0.07s
✅ JSON	prettier	4		0	0	0.34s
✅ JSON	v8r	4		0	0	2.99s
✅ MARKDOWN	markdownlint	132		0	0	3.61s
✅ MARKDOWN	markdown-table-formatter	132		0	0	2.11s
✅ REPOSITORY	validate-branch-name	yes		no	no	0.01s
✅ REPOSITORY	gitleaks	yes		no	no	9.77s
✅ REPOSITORY	ls-lint	yes		no	no	0.03s
✅ REPOSITORY	secretlint	yes		no	no	7.04s
✅ REPOSITORY	semgrep	yes		no	no	25.82s
✅ REPOSITORY	trivy	yes		no	no	3.94s
✅ SPELL	lychee	149		0	0	3.18s
✅ SPELL	proselint	133		0	0	90.83s
✅ YAML	prettier	12		0	0	0.85s
✅ YAML	v8r	11		0	0	5.33s
✅ YAML	yamllint	12		0	0	1.3s

See detailed reports in MegaLinter artifacts

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