SACRAMENTO — Assembly Republicans are bellying up to the bargaining table over Gov. Jerry Brown's proposed tax package for healthcare plans, signaling a new phase in the negotiations that have slogged on for more than a year.A document obtained by The Times lays out the political and policy wish list for the Assembly GOP caucus. Most significantly, they want to direct more than $800 million in spending made possible by the new tax. The Assembly GOP is calling for $290 million to fund services for the developmentally disabled and another $120 million to reimburse certain skilled nursing facilities, which suffered major cuts in 2011. The proposal would also put money toward paying off state debts: $240 million would go toward California's retiree healthcare liabilities for public employees and $175 million would repay transportation loans.