Add Reader max window size and Writer window size

[cce]

Adds NewWriterLevelDictWindowSize and NewReaderDictMaxWindowSize to limit memory usage during compression and decompression.

• NewWriterLevelDictWindowSize added to set specific window size (in bytes, not as log base 2)
• NewReaderDictMaxWindowSize added to set a maximum window size that this decompressor will allow, also in bytes.
• Tests exercising the Writer can set window sizes, and that limiting them in the Reader works.

More documentation on window sizes are in RFC 9659 and in zstd.h:

/*! ZSTD_DCtx_setMaxWindowSize() :
 *  Refuses allocating internal buffers for frames requiring a window size larger than provided limit.
 *  This protects a decoder context from reserving too much memory for itself (potential attack scenario).
 *  This parameter is only useful in streaming mode, since no internal buffer is allocated in single-pass mode.
 *  By default, a decompression context accepts all window sizes <= (1 << ZSTD_WINDOWLOG_LIMIT_DEFAULT)
 * @return : 0, or an error code (which can be tested using ZSTD_isError()).
 */

    ZSTD_c_windowLog=101,    /* Maximum allowed back-reference distance, expressed as power of 2.
                              * This will set a memory budget for streaming decompression,
                              * with larger values requiring more memory
                              * and typically compressing more.
                              * Must be clamped between ZSTD_WINDOWLOG_MIN and ZSTD_WINDOWLOG_MAX.
                              * Special: value 0 means "use default windowLog".

Resolves #123.