replacing ExecutorBuilder with Realm

[jasonwilliams]

This doesn't fix #119 but it helps with that.
We would still need to add the functionality for boa shell.

This removes InterpreterBuilder and replaces it with Realm which is to be inline with the spec

[github-actions]

Benchmark for fcd5fe6

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Test	PR Benchmark	Master Benchmark	%
Hello World (Execution)	393.9±13.99µs	170.0±7.05µs	231.99999999999997%
Hello World (Lexer)	1169.1±46.96ns	956.1±43.62ns	122%
Hello World (Parser)	1129.1±71.75ns	1125.4±46.84ns	100%
fibonacci (Execution)	5.0±0.13ms	4.7±0.15ms	107%

[github-actions]

Benchmark for b0ad912

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Test	PR Benchmark	Master Benchmark	%
Hello World (Execution)	413.3±32.51µs	181.7±5.22µs	227%
Hello World (Lexer)	1220.8±53.69ns	1100.4±39.54ns	111.00000000000001%
Hello World (Parser)	1183.9±49.38ns	1240.0±73.40ns	95%
fibonacci (Execution)	5.3±0.09ms	5.2±0.11ms	101%

[github-actions]

Benchmark for a2bf229

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Test	PR Benchmark	Master Benchmark	%
Create Realm	131.8±8.52µs	undefined	100%
Hello World (Execution)	358.9±19.06µs	160.1±9.34µs	224.00000000000003%
Hello World (Lexer)	1043.5±77.47ns	963.1±58.74ns	108%
Hello World (Parser)	1035.2±64.83ns	1081.7±77.08ns	96%
fibonacci (Execution)	4.8±0.18ms	4.7±0.24ms	101%

[github-actions]

Benchmark for c789dec

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Test	PR Benchmark	Master Benchmark	%
Create Realm	149.8±2.93µs	undefined	100%
Hello World (Execution)	170.7±6.03µs	178.3±4.33µs	96%
Hello World (Lexer)	1072.9±51.08ns	1014.9±35.12ns	106%
Hello World (Parser)	1297.8±42.79ns	1095.4±48.58ns	118%
fibonacci (Execution)	5.2±0.11ms	5.0±0.22ms	103%

[github-actions]

Benchmark for 450a3dd

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Test	PR Benchmark	Master Benchmark	%
Create Realm	153.8±10.71µs	undefined	100%
Hello World (Execution)	180.8±8.98µs	179.2±9.98µs	101%
Hello World (Lexer)	1042.5±37.85ns	1039.6±42.21ns	100%
Hello World (Parser)	1189.8±79.77ns	1202.7±74.96ns	99%
fibonacci (Execution)	5.2±0.17ms	5.3±0.27ms	97%