* chore: factor out rdb_load utilities into separate files
rdb_load.cc is huge and contains many auxillary classes.
This PR moves DecompressImpl and ErrorRdb code into detail/
It also fixes minor bugs around error conditions with de-compression:
a. Do not check-fail on invalid opcode and return error_code instead.
b. Print correctly LZ4 errors.
Signed-off-by: Roman Gershman <roman@dragonflydb.io>
* chore: fixes
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Signed-off-by: Roman Gershman <roman@dragonflydb.io>
