Docs - Add BibTeX in README and repo

[abuccts]

Add BibTeX for citation in README and repo.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 85.78%. Comparing base (9a3ce39) to head (610f575).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #632 +/- ## ======================================= Coverage 85.78% 85.78% ======================================= Files 97 97 Lines 6920 6920 ======================================= Hits 5936 5936 Misses 984 984 ``` | [Flag](https://app.codecov.io/gh/microsoft/superbenchmark/pull/632/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=microsoft) | Coverage Δ | | |---|---|---| | [cpu-python3.6-unit-test](https://app.codecov.io/gh/microsoft/superbenchmark/pull/632/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=microsoft) | `71.59% <ø> (ø)` | | | [cpu-python3.7-unit-test](https://app.codecov.io/gh/microsoft/superbenchmark/pull/632/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=microsoft) | `71.59% <ø> (ø)` | | | [cpu-python3.8-unit-test](https://app.codecov.io/gh/microsoft/superbenchmark/pull/632/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=microsoft) | `71.62% <ø> (ø)` | | | [cuda-unit-test](https://app.codecov.io/gh/microsoft/superbenchmark/pull/632/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=microsoft) | `83.86% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=microsoft#carryforward-flags-in-the-pull-request-comment) to find out more.

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[yzygitzh]

Is CITATION.bib necessary? I think we can just keep it in README.

[abuccts]

/azp run

[azure-pipelines[bot]]

Azure Pipelines successfully started running 3 pipeline(s).