grave quotes and double quotes

[JasonShin]

No description provided.

[Copilot]

Pull request overview

This PR improves SQL extraction from tagged template literals so escaped characters (notably backticks) are interpreted correctly, and adds demo coverage for quoted identifiers in PostgreSQL and MySQL.

Changes:

• Switch SQL extraction in the SWC tag parser to prefer the template literal’s “cooked” value, falling back to “raw” when needed.
• Add PostgreSQL demo queries covering double-quoted identifiers (table, qualified table, and columns).
• Add MySQL demo queries covering backtick-escaped identifiers (table, qualified table, and columns) along with snapshots.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/demo/select/double_quote_escaping.ts	Adds demo queries for PostgreSQL double-quoted identifiers.
tests/demo/select/double_quote_escaping.snapshot.ts	Adds snapshot typings for the new PostgreSQL demo queries.
tests/demo/select/double_quote_escaping.queries.ts	Adds expected generated typings for the new PostgreSQL demo queries.
tests/demo/mysql/backtick_escaping.ts	Adds demo queries for MySQL backtick-escaped identifiers (requires cooked template parsing).
tests/demo/mysql/backtick_escaping.snapshot.ts	Adds snapshot typings for the new MySQL demo queries.
tests/demo/mysql/backtick_escaping.queries.ts	Adds expected generated typings for the new MySQL demo queries.
src/parser/tag.rs	Fixes template literal handling by using cooked strings (with raw fallback) for SQL text.

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