Fix a few bugs, add new features, and enhance documentation

[parkerbxyz]

New features

• Add option to publish unverified cards
• Add option to perform a dry run sync

Bug fixes

• Fixes a bug preventing the action from completing successfully because it it could not determine if any files should be deleted
• Fixes a bug that was causing the action to fail when it tried to track an image without an extension with Git LFS
• Fixes a bug that was causing the action to fail when used in a matrix strategy

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ COPYPASTE	jscpd	yes		no	1.71s
✅ MARKDOWN	markdownlint	1		0	0.81s
✅ MARKDOWN	markdown-link-check	1		0	0.85s
✅ MARKDOWN	markdown-table-formatter	1		0	0.42s
✅ PYTHON	bandit	1		0	1.91s
✅ PYTHON	black	1		0	1.36s
✅ PYTHON	mypy	1		0	7.41s
✅ PYTHON	ruff	1		0	0.01s
✅ REPOSITORY	checkov	yes		no	11.1s
✅ REPOSITORY	gitleaks	yes		no	0.2s
✅ REPOSITORY	git_diff	yes		no	0.0s
✅ REPOSITORY	grype	yes		no	10.84s
✅ REPOSITORY	secretlint	yes		no	0.69s
✅ REPOSITORY	trivy	yes		no	4.17s
✅ REPOSITORY	trivy-sbom	yes		no	1.44s
✅ REPOSITORY	trufflehog	yes		no	3.86s
✅ SPELL	cspell	4		0	3.51s
✅ SPELL	lychee	2		0	0.37s
✅ YAML	prettier	1		0	0.41s
✅ YAML	v8r	1		0	1.9s
✅ YAML	yamllint	1		0	0.23s

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

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[github-actions]

🎉 This PR is included in version 2.1.0 🎉

The release is available on GitHub release

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