Storage Implementations

[benStre]

To support storing pointers persistently in the DATEX, we want to implement multiple storage interfaces (e.g. Databases like SQL, localStorage, file storage, embedded flash storage).

All storage interfaces must implement the PointerSource trait.
This issue serves as a collection issue for storage interfaces that we want to implement.

Storage Interfaces

• Common SQL Storage interface (for all SQL based relational databases)
• PostgreSQL interface
• SQLite interface
• LocalStorage interface (for JS runtime environments, implement in https://github.com/unyt-org/datex-core-js)
• IndexedDB interface (for JS runtime environments, implement in https://github.com/unyt-org/datex-core-js)