feat: unified CLI flags for seamless command switching

[zharinov]

Summary

• Migrate CLI from clap derive to builder API for per-command flag visibility control
• All 5 query commands (check, dump, infer, exec, trace) now accept the same flags
• Irrelevant flags are hidden from --help but silently accepted at runtime

Why

When debugging queries, users frequently switch between trace, exec, dump, etc. Previously this required manually removing command-specific flags:

plotnik trace query.ptk app.js --fuel 500 -vv
plotnik dump query.ptk app.js --fuel 500 -vv  # ERROR: unknown flags

Now all commands accept the union of all flags, so you can switch freely without editing the command line.

Unified Flags Matrix

Flag	check	dump	infer	exec	trace
SOURCE	hidden	hidden	hidden	visible	visible
--compact	hidden	hidden	hidden	visible	hidden
--verbose-nodes	hidden	hidden	visible	visible	hidden
--entry	hidden	hidden	hidden	visible	visible
-v	hidden	hidden	hidden	hidden	visible
--fuel	hidden	hidden	hidden	hidden	visible

Notes

• 39 tests verify flag acceptance and help visibility
• Helper functions (with_hidden_*_args) centralize the unified flags logic
• tree and langs commands unchanged (different domain)