fix: remove list timeout regression and broken call command residue

[haosenwang1018]

What

• remove a stray broken try block left in src/commands/call.ts
• stop calling getInstructions() from list, which avoids unnecessary extra round-trips during cold starts
• align the CLI help text with the actual config lookup precedence (-c/--config before MCP_CONFIG_PATH)

Why

This patch fixes two concrete problems and one docs/help mismatch:

1. call.ts contained an invalid leftover block that breaks Bun parsing/runtime behavior.
2. list was doing extra work that pushed the integration test over the timeout threshold in no-daemon cold-start scenarios.
3. The built-in --help text still described config lookup precedence less precisely than the implementation and README.

Testing

• bun test tests/integration/cli.test.ts tests/cli-errors.test.ts
• result: 68 pass / 0 fail