Benchmark for React Native (Hermes) target

[cometkim]

Resolves #46

This utilizes perf benchmark bundling to React Native (hermes) target using its default configuration.

Size of the bytecode outputs:

• graphemer: 140 KB
• unicode-segmenter/grapheme 48 KB

Then execute the Hermes bytecode to measure perf of graphemer vs unicode-segmenter/grapheme.

The result on my MacBook Pro M1 laptop:

graphemer (small input)
samples: 1000
duration (avg): 0.326

graphemer (medium input)
samples: 1000
duration (avg): 1.611

unicode-segmenter/grapheme (small input)
samples: 1000
duration (avg): 0.14

unicode-segmenter/grapheme (medium input)
samples: 1000
medium input (avg): 0.674

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Latest commit: db79d827575313b18328ab041b03d88b02314500

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[codecov[bot]]

Codecov Report

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

Project coverage is 100.00%. Comparing base (6d02503) to head (db79d82).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #47 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 18 18 Lines 2765 2765 ========================================= Hits 2765 2765 ```

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