fix: "bun run" to print syntax errors in package.json, not to print "No package.json found."

[sgasho]

What does this PR do?

• Documentation or TypeScript types (it's okay to leave the rest blank in this case)
• Code changes

this PR prints syntax errors in package.json.

close: #19604

How did you verify your code works?

I added some test cases at run_command.test.ts.

• I included a test for the new code, or an existing test covers it
• I wrote TypeScript/JavaScript tests and they pass locally (bun-debug test test-file-name.test)

Also, when I tested the "bun run" with an invalid package.json, it no longer printed "No package.json found." Instead, it printed syntax errors and the message "Failed parsing package.json."

Here are some screen shots.

package.json

{
    "name": "bun-bug",
    "scripts": {
      "start": "pwd",
      "install": "echo DDDD"
    },
    "module": "index.ts",
    "type": "module",
    "private": True,
    "devDependencies": {
      "@types/bun": "latest",
      "prettier":"latest"
    },
    "peerDependencies": {
      "typescript": "^5"
    }
}

before(The "No package.json found" message was printed out even though the package.json(has a syntax error though) file does exist.)	after(syntax error in package.json was printed out)