feat: Extract translation text from html and finished the mainly translation of zh_CN, zh_TW, ja_JP file (#987)

* feat: translate zh_cn properties

* feat: adjust some description messages_zh_CN.properties

* feat: translate zh_TW file done

* feat: zh_CN semantic optimization

* feat: Supplementary ja_JP translation

* feat: extract rest text

* feat: Sync to all lang.properties

* feat: translate zh_CN, zh_TW, ja_JP file

* fix: small bug

---------

Co-authored-by: yanyu_lin <yanyu_lin@bestsign.cn>

src/main/resources/templates/convert/pdf-to-pdfa.html

@@ -14,7 +14,7 @@
           <div class="row justify-content-center">
             <div class="col-md-6">
               <h2 th:text="#{pdfToPDFA.header}"></h2>
-              <p>Currently doesn't work for multiple inputs at once</p>
+              <p th:text="#{pdfToPDFA.tip}"></p>
               <form method="post" enctype="multipart/form-data" th:action="@{api/v1/convert/pdf/pdfa}">
                 <div th:replace="~{fragments/common :: fileSelector(name='fileInput', multiple=false, accept='application/pdf')}"></div>
                 <br>