Lower initial memory, with runtime config to set higher

[samwillis]

On mobile there can be a lower available memory, this sets the compile time INITIAL_MEMORY lower, then allows the user to specify a higher initial memory at runtime.

The enscripten generated source include this:

    if (Module['wasmMemory']) {
      wasmMemory = Module['wasmMemory']
    } else {
      var INITIAL_MEMORY = Module['INITIAL_MEMORY'] || 268435456
      wasmMemory = new WebAssembly.Memory({
        initial: INITIAL_MEMORY / 65536,
        maximum: 2147483648 / 65536,
      })
    }

[github-actions]

🚀 Deployed on https://66b90e87e24d8198f407954e--pglite.netlify.app

[github-actions]

Built bundles:

• Postgres WASM: https://github.com/electric-sql/pglite/actions/runs/10341975651/artifacts/1799558569
• PGlite: https://github.com/electric-sql/pglite/actions/runs/10341975651/artifacts/1799558606
• Interim build files: https://github.com/electric-sql/pglite/actions/runs/10341975651/artifacts/1799558588
• Demos: https://github.com/electric-sql/pglite/actions/runs/10341975651/artifacts/1799558640