nerf SAM (#258)

More costly (start at 1.5M), increase cost cap (4.5M), biggest timeout
(5s->10s), much lower chance to stop hydrogen (70%->10%), triple
construction time (10s->30s) otherwise it's trivial to build a SAM right
before a nuke hits

src/core/execution/SAMLauncherExecution.ts

@@ -22,7 +22,7 @@ export class SAMLauncherExecution implements Execution {
 
   private searchRange = 100;
 
-  private missileAttackRate = 50;
+  private missileAttackRate = 100; // 10 seconds
   private lastMissileAttack = 0;
 
   private pseudoRandom: PseudoRandom;

src/core/execution/SAMMissileExecution.ts

@@ -24,7 +24,9 @@ export class SAMMissileExecution implements Execution {
     private mg: Game,
     private pseudoRandom: number,
     private speed: number = 6,
+    // Regular atom bomb or warhead of MIRV
     private hittingChance: number = 0.75,
+    private hittingChanceHydrogen: number = 0.1,
   ) {}
 
   init(mg: Game, ticks: number): void {
@@ -61,7 +63,17 @@ export class SAMMissileExecution implements Execution {
       switch (result.type) {
         case PathFindResultType.Completed:
           this.active = false;
-          if (this.pseudoRandom < this.hittingChance) {
+          let hit = false;
+          if (
+            this.target.type() == UnitType.HydrogenBomb &&
+            this.pseudoRandom < this.hittingChanceHydrogen
+          ) {
+            hit = true;
+          } else if (this.pseudoRandom < this.hittingChance) {
+            hit = true;
+          }
+
+          if (hit) {
             this.target.delete();
 
             this.mg.displayMessage(