[JVSC-300] Remove quoting in nbcode launch arguments

[sid-srini]

• The nbcode executable is launched from the ts/js extension using Node's child_process.spawn function.
  • This function directly launches the command in a new process. It does NOT create a shell to execute it; unlike child_process.exec.
• Therefore, quoting the arguments passed to prevent shell splitting is not required.
  • In fact, due to the presence of extra quotes, it may lead to incorrect splitting of arguments with spaces in them.
  • This is the cause for the initialization failure of the extension nbls when the project folder opened contains spaces in its path.
• Fixed nbcode.ts to remove the extra quotes added for some of the option values.

Closes #300