Pynvme

pypi: add tcg library

update conformance test scripts to pypi

- AER: pynvme reaps and re-submit asynchronous event request commands. Scripts only send the first batch of AER commands with callback functions, and no need to call waitdone() for them.
- open source pynvme conformance test scripts in the submodule scripts/conformance

1. add extension tcg
2. bugfixes

1. driver:
1. pcie: `Pcie.close()` is required to free pcie resources
2. pcie: `Pcie.reset()` is re-implemented in python
1. controller: create controller object with user defined nvme init function
1. qpair: `Qpair.delete()` is required to delete SQ and CQ of the qpair
3. namespace: enable data verify feature by `Namespace.verify_enable()`
1. namespace: `Namespace.close()` is required to free namespace resources
5. subsystem: poweroff/poweron callback in subsystem
7. ioworker: op_percentage, specify any IO opcodes and their percentage
8. driver: support simultaneous tests on multiple devices
2. scripts:
1. more example test scripts
2. dirty power cycle test scripts
3. tools:
1. JEDEC client trace replayer
2. trace recorder and replayer
4. transition guide: https://github.com/pynvme/pynvme/wiki/Transition-Guide-from-v1.8-to-v1.9
5. mirror git repository: https://gitee.com/pynvme/pynvme

1. add a real-time performance gauge in VSCode plugin
2. update documents
3. bugfixes