JSR ignores local files entries in import map

[xubaiwang]

JSR ignores local file entries in import map, making it impossible to publish WASM module with overridden import.

The minimal example can be found in Deno docs - Overriding import specifiers.

;; toolkit.wat
(module
  (import "env" "get_time_in_seconds" (func $get_time (result i32)))

  (func (export "getValue") (result i32)
    call $get_time
  )
)

// deno.json
{
  "imports": {
    "env": "./env.ts"
  }
}

When such module is published, JSR fails with following error message: https://jsr.io/status/93bb4d40-f43b-4030-be65-45344621a8da

graphError
failed to build module graph: Relative import path "env" not prefixed with / or ./ or ../ at file:///build/release.wasm:1:51

Related issue: denoland/deno#30879