chore: init project structure

- Initialize git repository
- Add .gitignore (OS, editor, env, deps)
- Create DOC/ШАГИ/ directory for design documentation
- Add first step log: project kickoff and repo setup

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,19 @@
+# OS
+.DS_Store
+Thumbs.db
+
+# Editor
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# Env
+.env
+.env.local
+.env.*.local
+
+# Dependencies (добавим по мере определения стека)
+node_modules/
+__pycache__/
+*.pyc