feat(sample): add demo app for SDK

[goncalo-frade-iohk]

Sample/Demo app that will be helpful to show functionalities as well as testing the SDK

[github-actions]

🦙 MegaLinter status: ⚠️ WARNING

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ ACTION	actionlint	1		0	0.01s
✅ JSON	eslint-plugin-jsonc	10		0	0.88s
✅ JSON	jsonlint	10		0	0.21s
⚠️ JSON	prettier	10		1	0.5s
✅ JSON	v8r	10		0	2.95s
✅ REPOSITORY	checkov	yes		no	9.95s
✅ REPOSITORY	dustilock	yes		no	0.01s
✅ REPOSITORY	gitleaks	yes		no	2.72s
✅ REPOSITORY	git_diff	yes		no	0.01s
✅ REPOSITORY	secretlint	yes		no	1.31s
✅ REPOSITORY	syft	yes		no	0.58s
✅ YAML	prettier	2		0	0.41s
✅ YAML	yamllint	2		0	0.22s

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