Test: migration of recently opened to SQLite

[bpasero]

Refs: #138072

• anyOS @tanhakabir
• anyOS @alexr00

Complexity: 2

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Before, we used to store the list of recently opened files and folders (File > Open Recent...) in a JSON file. Now we migrate this data over to our main SQLite DB that contains global state.

Verification: ideally use a user-data-dir with a storage.json that is filled with recently opened workspaces (e.g. from Stable) and run Insiders over that directory. Verify your recently opened folders and files are migrated and not lost. Verify that opening new folders and files from File > Open... add entries to this list and preserve them between restarts.