fix(cli): ignore generated folders by default

- Skip .comments, virtualenvs, env files, VCS folders, and OS metadata in sync.
- Apply defaults before project .nanoshareignore and repeatable --ignore rules.
- Cover default ignores for local uploads and direct pattern matching.

cli/nanoshare_client/ignore.py

@@ -4,9 +4,29 @@ from fnmatch import fnmatch
 from pathlib import Path
 
 IGNORE_FILE_NAME = '.nanoshareignore'
+DEFAULT_IGNORE_PATTERNS = [
+  IGNORE_FILE_NAME,
+  '.comments/',
+  '.env',
+  '.env.*',
+  '.venv/',
+  'venv/',
+  '__pycache__/',
+  '.pytest_cache/',
+  '.mypy_cache/',
+  '.ruff_cache/',
+  '.git/',
+  '.hg/',
+  '.svn/',
+  '.DS_Store',
+  'Thumbs.db',
+  'desktop.ini',
+  '$RECYCLE.BIN/',
+  'System Volume Information/',
+]
 
 def load_ignore_patterns(root: Path, extra_patterns: list[str] | None = None) -> list[str]:
-  patterns = [IGNORE_FILE_NAME]
+  patterns = list(DEFAULT_IGNORE_PATTERNS)
   ignore_file = root / IGNORE_FILE_NAME
   if ignore_file.is_file():
     for line in ignore_file.read_text().splitlines():