feat(jstzd): implement jstzd cli

[huancheng-trili]

Context

Part of JSTZ-168.

JSTZ-168

Description

Implements jstzd run <config_path>.

crates/jstzd/tests/dummy.rs is removed because it has one dummy case that calls the revised main function and I didn't bother updating that.

Manually testing the PR

• Integration test: added new tests

$ cargo test --test main_test

running 4 tests
test unknown_command ... ok
test bad_config_file ... ok
test valid_config_file ... ok
test default_config ... ok

test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s

[codecov]

Codecov Report

Attention: Patch coverage is 94.11765% with 1 line in your changes missing coverage. Please review.

Project coverage is 47.73%. Comparing base (4be32b4) to head (bb610b7).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/jstzd/src/lib.rs	90.90%	1 Missing ⚠️

Files with missing lines	Coverage Δ
crates/jstzd/src/config.rs	96.70% <100.00%> (+0.23%)	⬆️
crates/jstzd/src/main.rs	100.00% <100.00%> (+100.00%)	⬆️
crates/jstzd/src/lib.rs	91.66% <90.90%> (-8.34%)	⬇️

... and 11 files with indirect coverage changes

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