feat: Write ZIP file to stream

[JakubOnderka]

Sometimes it is not possible or unnecessary to first write ZIP file to disk and then stream it to external system for example by HTTP protocol.

This pull request introduces new method ZipWriter::new_stream, that do not require Seek trait, so it is possible to stream ZIP file directly to output without Seek.

Streaming is supported by "data descriptor" that is written after compressed file.

4.3.5 File data MAY be followed by a "data descriptor" for the file.  Data 
   descriptors are used to facilitate ZIP file streaming.  

   4.3.9  Data descriptor:

        crc-32                          4 bytes
        compressed size                 4 bytes
        uncompressed size               4 bytes

      4.3.9.1 This descriptor MUST exist if bit 3 of the general
      purpose bit flag is set (see below).  It is byte aligned
      and immediately follows the last byte of compressed data.
      This descriptor SHOULD be used only when it was not possible to
      seek in the output .ZIP file, e.g., when the output .ZIP file
      was standard output or a non-seekable device.  For ZIP64(tm) format
      archives, the compressed and uncompressed sizes are 8 bytes each.

      4.3.9.2 When compressing files, compressed and uncompressed sizes 
      SHOULD be stored in ZIP64 format (as 8 byte values) when a 
      file's size exceeds 0xFFFFFFFF.   However ZIP64 format MAY be 
      used regardless of the size of a file.  When extracting, if 
      the zip64 extended information extra field is present for 
      the file the compressed and uncompressed sizes will be 8
      byte values.  

      4.3.9.3 Although not originally assigned a signature, the value 
      0x08074b50 has commonly been adopted as a signature value 
      for the data descriptor record.  Implementers SHOULD be 
      aware that ZIP files MAY be encountered with or without this 
      signature marking data descriptors and SHOULD account for
      either case when reading ZIP files to ensure compatibility.

      4.3.9.4 When writing ZIP files, implementors SHOULD include the
      signature value marking the data descriptor record.  When
      the signature is used, the fields currently defined for
      the data descriptor record will immediately follow the
      signature.

      4.3.9.5 An extensible data descriptor will be released in a 
      future version of this APPNOTE.  This new record is intended to
      resolve conflicts with the use of this record going forward,
      and to provide better support for streamed file processing.

      4.3.9.6 When the Central Directory Encryption method is used, 
      the data descriptor record is not required, but MAY be used.  
      If present, and bit 3 of the general purpose bit field is set to 
      indicate its presence, the values in fields of the data descriptor
      record MUST be set to binary zeros.  See the section on the Strong 
      Encryption Specification for information. Refer to the section in 
      this document entitled "Incorporating PKWARE Proprietary Technology 
      into Your Product" for more information.