Replace the `StmtParam`/`ParameterExtractor` machinery with a shared
`SqlPageExpr` type parameterized over its input source, distinguishing
standalone expressions from per-row expressions via the type system.
Rename `ParsedSqlFile` to `SqlFile` and split SQL parsing into dedicated
`dialect`, `rewrite`, and `statement` submodules. Queries are now
rewritten into either a database query with bindings and computed
columns, or a single-row query evaluated without a database round trip.
Make `SqlPageFunctionName` parsing case-insensitive and support
SQLPage-computed projections and nested functions over query results.
* simplify SQL test files
- Simplified SQL test files by removing unnecessary components and restructuring queries to focus on expected vs actual results.
- Updated the request handling in `run_sql_test` to differentiate between JSON and HTML responses based on test file content.
- Enhanced error handling and assertions for both JSON and HTML responses to improve test reliability and clarity.
- Removed redundant code and improved readability in the test execution flow.
* move more tests to the new expected/actual format
* migrate more tests to the expected/actual format
- Changed references in various test files to point to the new `simple.sql` instead of the outdated `it_works_simple.sql`.
- Removed several obsolete SQL test files that are no longer needed, streamlining the test suite.
- Updated assertions and request paths in the test cases to reflect the new structure and improve clarity.
* Enhance error handling in SQL tests and update SQL syntax
- Added a new function `format_error` to improve error reporting in SQL test assertions, capturing detailed error descriptions and backtraces.
- Updated SQL syntax in `sqrt.sql` to use `INT` instead of `integer` for consistency with SQL standards.
* sqrt test
Ophir LOJKINE