Update database client installation commands

[s-h-a-d-o-w]

A few minor changes:

• Sort commands alphabetically
• Add lancedb
• Make commands copy-pasteable. See:

~/temp/vdbb 10svdbb ❯ uv pip install vectordb-bench[pgvector]
zsh: no matches found: vectordb-bench[pgvector]

~/temp/vdbbvdbb ❯ uv pip install 'vectordb-bench[pgvector]'
Resolved 93 packages in 715ms
Prepared 3 packages in 143ms
Installed 3 packages in 2ms
 + pgvector==0.5.0
 + psycopg==3.3.4
 + psycopg-binary==3.3.4

Please just let me know if you maybe don't want one of these changes and I'll undo that.

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[yhmo]

README.md line:53
Medium ---- This command requests a hologres extra that is not declared in pyproject.toml, and the same is true of tencent_es on line 66. Pip can still leave the base package installed after warning about an unknown extra, so Hologres's psycopg or Tencent ES's elasticsearch dependency remains missing even though the copy-pasted install appears to complete. Please map these clients to declared dependency groups (for example pgvector / elastic) or add matching extras so the documented commands actually provision the selected client.

[s-h-a-d-o-w]

I'm fine with adding the additional entries you mentioned below but I would kindly ask that you take care of these improvements here yourself because I'm not that familiar with this project and all its integrations.

[yhmo]

README.md line:54
Medium ---- Since this change refreshes the “All the database client supported” inventory, could we also include mariadb, clickhouse, turbopuffer, pinot, and seekdb? Each is registered in the DB/CLI and has a declared optional-dependency key at this head, so leaving them out keeps the supposedly complete, copy-pasteable lookup table out of sync with the integrations users can actually select.

[s-h-a-d-o-w]

Done.