chore: clean up logs and IDE files, add git hygiene

- Remove runtime logs (access/error logs are not needed in repo)
- Remove .idea/ IDE configuration directory
- Add .gitignore for logs, IDE, OS files
- Add .gitattributes to preserve KOI8-R encoding for archive files
- Preserve all text files as-is without CRLF normalization

.gitignore

@@ -0,0 +1,24 @@
+# IDE
+
+vendor/
+node_modules/
+# Dependencies
+
+.vscode/
+*~
+*.swo
+*.swp
+# Editor backups
+
+*.gz
+*.log.*
+*.log
+logs/
+# Runtime logs and locks
+
+Thumbs.db
+.DS_Store
+# OS
+
+*.iml
+.idea/