CLI tests

Live under crates/canopen-eds-cli/tests/.

Test Case: cargo eds expand emits a single device's code TEST_0660
status: open
verifies: REQ_0770

Spawn the CLI as cargo eds expand --device EPOS4 --glob <fixtures>/*.eds, capture stdout, assert the output is non-empty, parses as Rust, and contains exactly one pub struct EPOS4_REV0140 (or equivalent rev-suffixed) definition.
Test Case: cargo eds list enumerates devices TEST_0661
status: open
verifies: REQ_0771

Run cargo eds list --glob <fixtures>/*.eds over a 3-device fixture set, assert stdout contains 3 lines each matching the <ident>\t<vendor_id>\t<product_code>\t<revision> format.
Test Case: CLI output matches build helper output byte-for-byte TEST_0662
status: open
verifies: REQ_0772

For one fixed device, capture the CLI’s expand output and the build helper’s per-device slice of $OUT_DIR/devices.rs. Assert the two byte-strings are identical (catches divergent code paths between CLI and build).