Infrastructure: GitHub actions added

[IvanKuchin]

• config modification
• add CLI
• rename cmd -> cli
• VSCode config added
• main app moved to cmd-folder
• VSCode config updated
• first version of pi-hole custom
• first version of pi-hole custom
• minor cleanup
• type refactoring
• pihole integration added
• cleanup
• GitHub actions

[github-actions]

@check-spelling-bot Report

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❌ Errors	Count
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ℹ️ no-newline-at-eof	1

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Previously acknowledged words that are now absent

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