feat: add new UI structure and assets

refactor: remove legacy files from repo, keep locally in /archive/

chore: init project structure - add Gemgile, _config.yml - setup .gitignore for archive/, Gemfile.lock, .idea/ - add index.html and default layout

Игнорировать /archive/

update: README.md

delete .obsidian/workspace.json

delete .obsidian/graph.json

delete .obsidian/core-plugins.json

delete .obsidian/core-plugins-migration.json

delete .obsidian/appearance.json

delete .obsidian/app.json

delete 2024-09-12.md

update RubyOnRails/install_Ruby.md

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