release: core 0.6.1, connectors and react minor

[rahulmahadik]

Version bumps written by changeset version. No source changes; the code landed in #19 and #20.

Package	Version	Bump
@asksql/core	0.6.1	patch
@asksql/sqlite	0.4.0	minor
@asksql/postgres, @asksql/mysql, @asksql/duckdb	0.3.0	minor
@asksql/oracle, @asksql/mongodb, @asksql/mcp	0.2.0	minor
@asksql/react	0.3.0	minor
@asksql/server	0.6.0	minor
@asksql/widget	0.2.6	patch, as a dependent

Core is a patch: two behaviour fixes, no API change.

The connectors are a minor rather than a patch on purpose. Moving @asksql/core from a
dependency to a peer breaks one install shape: yarn and npm with legacy-peer-deps do not
auto-install peers, so installing a connector on its own now fails where it worked before. A patch
must not be able to do that. The documented npm i @asksql/core @asksql/<connector> is unaffected.