RFC: Migrate Embedded JSON to Procedural Macros/Codegen in swc_ecma_preset_env

[magic-akari]

In the crates/swc_ecma_preset_env directory, we extensively use the include_str! macro to embed JSON files, which are then deserialized at runtime.

This approach negatively impacts both runtime performance and binary size.

We could leverage procedural macros or codegen to generate Rust code directly from the JSON files at build time.

[kdy1]

Personally, I would like to see improvements in other directions, such as getting a path to a JSON file so that the user can update the caniuse data independently of SWC.