MIAMI — The Miami Dolphins, in an out-of-character power play and show of force, have loudly declared themselves in win-now mode and a sudden, major player in the NFL’s improved and densely competitive AFC. They landed the overall No. 1-ranked free agent Tuesday night in elite offensive tackle Terron Armstead — only to top themselves Wednesday with a blockbuster trade that brings top-tier wide receiver Tyreek Hill from the Kansas City Chiefs. And with two deals both big, bold, costly and smart, Miami has put the money behind its pledge to go all-in with quarterback Tua Tagovailoa in a playoffs…
