feat(ffi): Add IndexedDB and in-memory session stores support

[Hywan]

This is a reboot of #5245.

This patch introduces the sqlite and indexeddb feature flag, enabling the use of SQLite or IndexedDB for the session store. This patch also introduces the ability to use non-persistent, in-memory session store.

The new ClientBuilder::session_store_in_memory, ClientBuilder::session_store_with_sqlite and ClientBuilder::session_store_with_indexeddb methods are introduced to configure the session store. This patch adds new SqliteSessionStoreBuilder and IndexedDbSessionStoreBuilder structure.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.50%. Comparing base (9af8fad) to head (1815eb9).
⚠️ Report is 9 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5811   +/-   ##
=======================================
  Coverage   88.50%   88.50%           
=======================================
  Files         360      360           
  Lines      100723   100723           
  Branches   100723   100723           
=======================================
+ Hits        89141    89142    +1     
  Misses       7398     7398           
+ Partials     4184     4183    -1     

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[codspeed-hq]

CodSpeed Performance Report

Merging #5811 will not alter performance

_{Comparing Hywan:pr-5245-reboot (1815eb9) with main (c3e01a6)}

Summary

✅ 50 untouched

[poljar]

Looks good. I would perhaps remove the session_ prefix from the various functions and just call it ClientBuilder::sqlite_store() or something along those lines.

I don't think the deprecated warning passes over the FFI, but don't mind it either.

[Hywan]

Thanks for the renaming suggestion. Here are the new names:

• ClientBuilder::in_memory_store
• ClientBuilder::sqlite_store
• ClientBuilder::indexeddb_store

[poljar]

Thanks for the renaming suggestion. Here are the new names:

* `ClientBuilder::in_memory_store`

* `ClientBuilder::sqlite_store`

* `ClientBuilder::indexeddb_store`

Looking good.