Make --dbname and --dbuser optional when SQLite integration is active

[Copilot]

wp config create unconditionally requires --dbname and --dbuser, making it impossible to create a config for a SQLite-backed WordPress install without supplying MySQL credentials that will never be used.

Changes

• Optional synopsis params: --dbname and --dbuser are now [--dbname] / [--dbuser] in the docblock synopsis, with descriptions clarifying they are required unless the SQLite integration drop-in is detected.
• SQLite detection: New is_sqlite_integration_active() checks for an actual SQLITE_DB_DROPIN_VERSION constant definition in wp-content/db.php (reads first 8 KB only) using is_file()/is_readable() guards and a regex match to avoid false positives from comments or strings.
• Conditional validation: When SQLite is not detected, missing --dbname or --dbuser still produces an explicit error — existing MySQL/MariaDB behaviour is unchanged.
• Skip MySQL check for SQLite: The mysqli connection check is bypassed entirely when SQLite is detected, so --skip-check is not required.
• New @require-sqlite Behat scenario: Verifies wp config create succeeds without --dbname/--dbuser when the SQLite drop-in is present.
• New @require-mysql Behat scenario: Asserts exit code 1 and the expected error messages when --dbname or --dbuser are omitted on a non-SQLite install, keeping this validation stable going forward.

# SQLite install — now works without MySQL credentials
$ wp config create --skip-salts --skip-check
Success: Generated 'wp-config.php' file.

# MySQL install — still errors clearly if params are omitted
$ wp config create --skip-check
Error: Parameter errors:
missing --dbname parameter (Set the database name.)

[codecov]

Codecov Report

❌ Patch coverage is 71.42857% with 6 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/Config_Command.php	71.42%	6 Missing ⚠️

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

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[Copilot]

The synopsis now marks --dbname/--dbuser as optional, but they’re still required for non-SQLite installs (enforced later in create()). To avoid misleading wp help config create output, consider updating the option descriptions to explicitly state “Required unless SQLite integration drop-in is detected.”