feat: add version flag, fix --float parsing, and optimize distributions

src/help.ts

@@ -1,3 +1,5 @@
+import { VERSION } from "./types";
+
 export const HELP = `rand — Generate random numbers
 
 Usage:
@@ -5,19 +7,20 @@ Usage:
 
 Options:
   -c, --count <n>     Number of random numbers to output (default: 1)
-  -f[N]               Decimal places: -f = -f2 (default: 2)
+  -f[N]               Decimal places: -f = -f2, -f3 = 3 places
   --float [N]         Long form of -f
   -d, --dist <name>   Distribution (default: uniform)
   -h, --help          Show this help
+  -V, --version       Show version
 
 Distributions and their positional args:
-  uniform             rand [min] [max]               (default: 0 100)
+  uniform             rand [min] [max]                (default: 0 100)
   normal              rand -d normal [mean] [stddev]  (default: 0 1)
-  binomial            rand -d binomial [n] [p]        (default: 10 0.5)
-  poisson             rand -d poisson [lambda]        (default: 1)
-  exponential         rand -d exponential [lambda]    (default: 1)
+  binomial            rand -d binomial [n] [p]         (default: 10 0.5)
+  poisson             rand -d poisson [lambda]         (default: 1)
+  exponential         rand -d exponential [lambda]     (default: 1)
   hypergeometric      rand -d hypergeometric [N] [K] [n]
-                                                  (default: 100 50 10)
+                                                   (default: 100 50 10)
 
 Examples:
   rand                               # uniform 0–100
@@ -33,3 +36,8 @@ export function showHelp(): never {
   console.log(HELP);
   process.exit(0);
 }
+
+export function showVersion(): never {
+  console.log(`rand v${VERSION}`);
+  process.exit(0);
+}