Split runtime into multiple files

[j-f1]

This PR:

• splits the runtime TypeScript code up into several separate modules
• adds Rollup to compile that back into a single JS file
• uses Rollup to produce two bundles instead of one:
  • one that uses UMD to allow use with Node-style require, or by embedding it with a <script> tag and using window.JavaScriptKit
  • one that uses ES Modules
• refactor the codebase to use a Memory class that provides easy access to memory and the heap
• check for FinalizationRegistry availability in SwiftClosureDeallocator constructor rather than outside of it

[github-actions]

Time Change: -307ms (3%)

Total Time: 8,905.5ms

Test name	Duration	Change
Object heap/Increment and decrement RC	2,731.25ms	-223ms (8%)	✅

ℹ️ View Unchanged

Test name	Duration	Change
Serialization/Write JavaScript number directly	196ms	-6ms (3%)
Serialization/Write JavaScript string directly	200.25ms	-4.5ms (2%)
Serialization/Swift Int to JavaScript	2,983.75ms	+2.75ms (0%)
Serialization/Swift String to JavaScript	2,794.25ms	-76.25ms (2%)

_{performance-action}

[kateinoigakukun]

Some tests are failing 👀

Error in Literal Conversion

MessageError(message: "Expect to be equal \"212205744152385\" and \"4746794007244308480\"", file: "/home/runner/work/JavaScriptKit/JavaScriptKit/IntegrationTests/TestSuites/Sources/PrimaryTests/main.swift", line: 26, column: 28)

Swift/ErrorType.swift:200: Fatal error: Error raised at top level: PrimaryTests.MessageError(message: "Expect to be equal \"212205744152385\" and \"4746794007244308480\"", file: "/home/runner/work/JavaScriptKit/JavaScriptKit/IntegrationTests/TestSuites/Sources/PrimaryTests/main.swift", line: 26, column: 28)

RuntimeError: unreachable
    at $ss17_assertionFailure__4file4line5flagss5NeverOs12StaticStringV_SSAHSus6UInt32VtF (wasm://wasm/02991d2a:wasm-function[2633]:0xccfd3)
    at swift_errorInMain (wasm://wasm/02991d2a:wasm-function[4819]:0x14b4ac)
    at main (wasm://wasm/02991d2a:wasm-function[1532]:0x76025)
    at main (wasm://wasm/02991d2a:wasm-function[29674]:0x622f25)
    at __main_void (wasm://wasm/02991d2a:wasm-function[29675]:0x622fa1)
    at __original_main (wasm://wasm/02991d2a:wasm-function[29672]:0x622ee6)
    at _start (wasm://wasm/02991d2a:wasm-function[45]:0x10884)
    at d.start (/home/runner/work/JavaScriptKit/JavaScriptKit/IntegrationTests/node_modules/@wasmer/wasi/lib/index.cjs.js:77:280)
    at startWasiTask (/home/runner/work/JavaScriptKit/JavaScriptKit/IntegrationTests/lib.js:47:10)

[j-f1]

It turned out to be an endianness issue, oof. Hoping this change fixes it 🤞

[MaxDesiatov]

Overall seems legit 👍 but I'd wait for at least one more approval from the team