CLI overhaul, again

[minsungc]

This PR overhauls the CLI so that

1. We now have default arguments. The default is writing a foo.lqp file to foo.bin and similarly so for directories. So now you can just do

lqp foo.lqp

2. There's been some confusion on how --bin, --json, and --out interact with each other. Now we make this explicit by having a --format argument where BIN and JSON emitting is explicitly specified. --out has not changed in behavior.

[Copilot]

Pull Request Overview

This PR overhauls the CLI interface for the LQP parser to provide clearer argument semantics and better default behavior. The main changes are replacing separate --bin/--json flags with a unified --format argument and adding default output paths so users can simply run lqp foo.lqp without additional arguments.

• Replaces --bin, --json, and --out flags with --format and -o/--out for clearer argument handling
• Adds default behavior where foo.lqp outputs to foo.bin (or foo.json with --format json)
• Consolidates file and directory processing logic to use the new argument structure

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
python-tools/src/lqp/parser.py	Refactored CLI argument parsing and processing functions to use new format/output structure
python-tools/README.md	Updated documentation to reflect new CLI usage patterns and examples

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[davidwzhao]

Maybe i missed something, is output_base used? Maybe we should also support something like lqp -o output/folder input/folder?