* Refactor test data into functions
* Add a typed snapshot test for scanner storage
* Use standard hex serialization with SaplingScannedResult
* Simplify transaction::Hash hex serialization
* Sort HashMaps before snapshotting
* Add typed snapshot data
* Make some scanner storage methods more flexible
* Move tests to a submodule and expose test functions and constants
* Make scanner functions clearer and easier to use
* Simplify state snapshot test code
* Add raw data snapshot tests for the scanner
* Add snapshots
* Fix import path
* Fix import conditional compilation
* fix imports
* fix imports 2
* Put read and write db exports together
* Remove confusing IntoDisk/FromDisk impl
* Fix an incorrect unused method that could panic
* Delete a test that is no longer valid
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Co-authored-by: Alfredo Garcia <oxarbitrage@gmail.com>