Add secure spawn APIs, PTY support, interactive/streaming control, timeouts and buffer limits; update README and tests
- Introduce execSpawn family (execSpawn, execSpawnStreaming, execSpawnInteractiveControl) for shell-free, secure execution of untrusted input (shell:false).
- Add PTY support (optional node-pty) with execInteractiveControlPty and execStreamingInteractiveControlPty; PTY is lazy-loaded and documented as an optional dependency.
- Expose interactive control primitives (sendInput, sendLine, endInput, finalPromise) for both spawn and shell-based executions, and streaming interfaces with process control (terminate, kill, keyboardInterrupt, customSignal).
- Implement timeouts, maxBuffer limits and onData callbacks to prevent OOM, stream output incrementally, and support early termination and debugging logs.
- Improve process lifecycle handling: safe unpipe/unpipe-on-error, smartexit integration, and safer signal-based tree-kill behavior.
- Enhance execAndWaitForLine with timeout and terminateOnMatch options to allow pattern-based waits with configurable behavior.
- Update README with a Security Guide recommending execSpawn for untrusted input, PTY usage guidance, and new feature documentation (timeouts, buffer limits, debug mode, environment control).
Update tests & CI config, bump deps, add docs and project configs
- Add comprehensive README overhaul with detailed usage, examples, API reference and best practices.
- Add extensive silent-mode tests (test/test.silent.ts) to validate execSilent, execStrictSilent, execStreamingSilent and execAndWaitForLineSilent behaviors.
- Update test runner and script: test script now runs tstest with --verbose, --logfile and --timeout; tests now import tapbundle from @git.zone/tstest.
- Fix import in test/test.ts to use @git.zone/tstest/tapbundle.
