feat: rich text template (#68)

* feat: add file

* feat: add template convert function

* refactor: update function

src/utils/string-template.ts

@@ -0,0 +1,34 @@
+const templates = {
+  'my-template': {
+    converter: (context?: number[]) => {
+      return context?.join(', ') || '';
+    },
+  },
+} as const;
+
+type Template = typeof templates;
+type TemplateName = keyof Template;
+type TemplateContext = {
+  [key in TemplateName]: Parameters<Template[TemplateName]['converter']>[0];
+};
+
+export function convertTemplate(
+  text: string,
+  context?: TemplateContext,
+  templateUse?: TemplateName[],
+) {
+  let ret = text;
+
+  for (const [name, template] of Object.entries(templates)) {
+    if (templateUse && !templateUse.includes(name as TemplateName)) continue;
+
+    ret = text.replace(
+      new RegExp('\\#\\[' + name.replaceAll('-', '\\-') + '\\]', 'g'),
+      typeof template.converter === 'function'
+        ? template.converter(context?.[name as TemplateName])
+        : template.converter,
+    );
+  }
+
+  return ret;
+}