add mooore typography rules

packages/extension-typography/index.ts

@@ -9,8 +9,15 @@ import {
   InputRule,
 } from 'prosemirror-inputrules'
 
-export const leftwardsArrow = new InputRule(/<-$/, '←')
-export const rightwardsArrow = new InputRule(/->$/, '→')
+export const leftArrow = new InputRule(/<-$/, '←')
+export const rightArrow = new InputRule(/->$/, '→')
+export const copyright = new InputRule(/\(c\)$/, '©')
+export const registeredTrademark = new InputRule(/\(r\)$/, '®')
+export const oneHalf = new InputRule(/1\/2$/, '½')
+export const plusMinus = new InputRule(/\+\/-$/, '±')
+export const notEqual = new InputRule(/!=$/, '≠')
+export const laquo = new InputRule(/<<$/, '«')
+export const raquo = new InputRule(/>>$/, '»')
 
 const Typography = createExtension({
   addInputRules() {
@@ -21,8 +28,15 @@ const Typography = createExtension({
       closeDoubleQuote,
       openSingleQuote,
       closeSingleQuote,
-      leftwardsArrow,
-      rightwardsArrow,
+      leftArrow,
+      rightArrow,
+      copyright,
+      registeredTrademark,
+      oneHalf,
+      plusMinus,
+      notEqual,
+      laquo,
+      raquo,
     ]
   },
 })