docs: support document internationalization #222

* docs: add English docuemnt #213

* docs: support document internationalization #222

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Co-authored-by: Hufe921 <huangyunfeihufe@hotmail.com>

docs/en/guide/contextmenu-internal.md

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+# Internal Contextmenu
+
+## Global
+
+- Cut
+- Copy
+- Paste
+- Select all
+- Print
+
+## Hyperlinks
+
+- Delete the link
+- Unlink
+- Edit the link
+
+## Image
+
+- Change the picture
+- Save as picture
+- Text wrapping
+- Embedded type
+- Upper and lower surrounding
+
+## Table
+
+- Table borders
+- All borders
+- Borderless
+- Outer border
+- Vertical alignment
+- Top alignment
+- Center vertically
+- Bottom end alignment
+- Insert rows and columns
+- Insert 1 row above
+- Insert 1 row below
+- Insert 1 column on the left
+- Insert 1 column on the right side
+- Delete rows and columns
+- Delete 1 row
+- Remove 1 column
+- Delete the entire table
+- Merge cells
+- Cancel the merge
+
+## control
+
+- Delete the control