fix(types): move types declaration into "real" types declaration file (.d.ts)

package.json

@@ -13,7 +13,7 @@
   },
   "files": [
     "picocolors.*",
-    "types.ts"
+    "types.d.ts"
   ],
   "keywords": [
     "terminal",

types.d.ts

@@ -0,0 +1,52 @@
+export type Formatter = (input: string | number | null | undefined) => string
+
+export interface Colors {
+    isColorSupported: boolean
+
+    reset: Formatter
+    bold: Formatter
+    dim: Formatter
+    italic: Formatter
+    underline: Formatter
+    inverse: Formatter
+    hidden: Formatter
+    strikethrough: Formatter
+
+    black: Formatter
+    red: Formatter
+    green: Formatter
+    yellow: Formatter
+    blue: Formatter
+    magenta: Formatter
+    cyan: Formatter
+    white: Formatter
+    gray: Formatter
+
+    bgBlack: Formatter
+    bgRed: Formatter
+    bgGreen: Formatter
+    bgYellow: Formatter
+    bgBlue: Formatter
+    bgMagenta: Formatter
+    bgCyan: Formatter
+    bgWhite: Formatter
+
+    blackBright: Formatter
+    redBright: Formatter
+    greenBright: Formatter
+    yellowBright: Formatter
+    blueBright: Formatter
+    magentaBright: Formatter
+    cyanBright: Formatter
+    whiteBright: Formatter
+
+    bgBlackBright: Formatter
+    bgRedBright: Formatter
+    bgGreenBright: Formatter
+    bgYellowBright: Formatter
+    bgBlueBright: Formatter
+    bgMagentaBright: Formatter
+    bgCyanBright: Formatter
+    bgWhiteBright: Formatter
+
+}