feat: add d.ts for the main converter function to support TypeScript

Closes #9

package.json

@@ -28,6 +28,7 @@
 		"remark",
 		"unified"
 	],
+	"types": "types/index.d.ts",
 	"author": "Skoropad Aleksandr <[email protected]>",
 	"license": "MIT",
 	"bugs": {

types/index.d.ts

@@ -0,0 +1,13 @@
+export type UnsupportedTagsStrategy = 'escape' | 'remove' | 'keep'
+
+declare module 'telegramify-markdown' {
+
+  /**
+   * Converts markdown to Telegram's format.
+   * @param markdown The markdown to convert.
+   * @param unsupportedTagsStrategy The strategy to use for unsupported tags.
+   */
+  function convert(markdown: string, unsupportedTagsStrategy: UnsupportedTagsStrategy): string
+
+  export = convert
+}