Add advanced clone options support across the frontend and backend.
Users can specify a branch, shallow limits, blobless mode, sparse paths,
and custom clone flags when initiating a clone operation. The backend
validates inputs, parses custom flags without invoking a shell, and
configures sparse checkouts after a successful clone. A small parsing
dependency was added and tracked-file parsing was improved to better
handle git ls-files output.
- Introduce CloneRunOptions and validation helpers for clone inputs
- Parse custom flags with a shell-like tokenizer and block managed flags
- Support sparse checkout configuration and shallow clone constraints
Christoph
90df347e4a