hree courts have applied the third-party beneficiary doctrine to confer standing on third parties to enforce immunity provisions in plea agreements. Florida West, 853 F. Supp. 2d at 1228; El- Sadig, 133 F. Supp. 2d at 608-09; United States v. CFWConst Co., 583 F. Supp. 197, 203 (D.S.C. 1984), aff'd, 749 F.2d