Update to v0.15.1 of cr-sqlite

[tantaman]

This syncs the v0.15.1 release of cr-sqlite to libsql.

Todo:

• Hook into the new cleanup routine add sqlite3_close_hook #219 (Done: e583c67)
• Add valgrind test cases to check that new cleanup routine works as expected for cr-sqlite

Other / outside of this PR:

• Re-enable this extension for Turso.
  • Note: if you auto-init this extension on connection create it will increase the time to create a new SQLite connection. Are Turso connections cached? Should we lazily init the extension? I've not measured this number but loading the extension involves preparing some statements which isn't cheap in SQLite.
• Complete cr-sqlite x Turso example -- Turso example vlcn-io/cr-sqlite#376

[penberg]

@tantaman Looks good! There are some conflicts that prevent merging, though.

[tantaman]

@penberg - Once this is in, how can I go about getting it enabled on my turso instance? Or is it pretty simple to stand up sqld as if it were Turso on my own box?

[tantaman]

Conflicts resolved.

[psarna]

ah snap, some more conflicts appeared; I'll try to go over them manually if trivial

[tantaman]

I can rebase again and see what's up. Weird that ext/crr files are conflicting since those shouldn't have changed in main 🤔

[psarna]

I ended up rebasing manually; we restructured the repo lately and moved the root directory to libsql-sqlite3, hence the huge conflicts

[tantaman]

closing in favor of: #488

which uses the new directory layout.

ah, you already did it here: #472