[zh-cn]: add & sync transaltion for File API

[skyclouds2001]

File API

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1. [zh-cn]: sync translation for File API #21119
   l10n-zh +1
2. [zh-cn]: sync translation for Blob and Blob() #21056
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3. [zh-cn]: sync translation for Blob.{size,type,slice()} #21057
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4. [zh-cn]: sync translation for Blob.{arraybuffer(),stream(),text()} #21058
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5. [zh-cn]: sync translation for File and File() #20433
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6. [zh-cn]: sync translation for File.{lastModified,lastModifiedDate,name} #20418
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7. [zh-cn]: sync translation for FileList #20356
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8. [zh-cn]: add translation for FileList.length #20358
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9. [zh-cn]: add translation for FileList.item() #20357
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10. [zh-cn]: sync translation for FileReader and FileReader() #20324
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11. [zh-cn]: sync translation for FileReader.{error,readState,result} #20335
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12. [zh-cn]: sync translation for FileReader.{abort(), abort, load} #20359
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13. [zh-cn]: sync translation for FileReader.{readAsArrayBuffer(),readAsBinaryString(),readAsDataURL(),readAsText()} #20325
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14. [zh-cn]: add translation for FileReader.{error,loadend,loadstart,progress} #20392
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15. [zh-cn]: sync translation for FileReaderSync #20170
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16. [zh-cn]: add translation for FileReaderSync() #20270
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17. [zh-cn]: add translation for FileReaderSync.readAsArrayBuffer() #20272
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18. [zh-cn]: add translation for FileReaderSync.readAsBinaryString() #20271
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19. [zh-cn]: add translation for FileReaderSync.readAsDataURL() #20273
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20. [zh-cn]: add translation for FileReaderSync.readAsText() #20274
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21. [zh-cn]: update the translation of URL createObjectURL() static method #20673
    l10n-zh +1
22. [zh-cn]: update the translation of URL revokeObjectURL() static method #20676
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