feat(cli): sync folders with remote paths

- Store synced folder locations in file_path instead of embedding them in file names.
- Add ignore rules from .nanoshareignore and repeatable sync --ignore flags.
- Adopt existing remote files only after SHA-256 verification.
- Move adopted remotes with metadata updates instead of uploading duplicates.
- Bump NanoShare to 1.23.0 and the standalone CLI to 0.2.0.

cli/nanoshare_client/remote_path.py

@@ -0,0 +1,18 @@
+from __future__ import annotations
+
+from pathlib import PurePosixPath
+
+def split_remote_path(value: str, file_id: str = '') -> tuple[str, str]:
+  raw = (value or file_id).replace('\\', '/')
+  parts = [
+    part for part in PurePosixPath(raw).parts
+    if part not in ('', '.', '..', '/')
+  ]
+  if not parts:
+    return file_id, ''
+  return parts[-1], '/'.join(parts[:-1])
+
+def join_remote_path(file_name: str, file_path: str | None = None, file_id: str = '') -> str:
+  name, embedded_path = split_remote_path(file_name, file_id)
+  clean_path = split_remote_path(f'{file_path or ""}/placeholder')[1] if file_path else embedded_path
+  return f'{clean_path}/{name}' if clean_path else name