Update prefer-robust-stmts to be alembic version aware + code formatter

Added

• linter: prefer-robust-stmts aware of alembic version update transactions (#1311). Thanks @DylanGriffith!

• fmt: support for all statements (#1321, #1319, #1317, #1312, #1310, #1309, #1307, #1306, #1305, #1303, #1302, #1300, #1299)

• ide: add formatting support (#1315)

• ide: code action isnull -> is null, notnull -> is not null (#1296)

• ide: code actions for func params (#1322)

• ide: code action to convert default to = in function syntax (#1316)

• ide: code actions for :=/=> & value/: rewrites (#1313)

• parser: validation for variadic, function defaults, params (#1325, #1324, #1323)

• parser: validate string literal type cast (#1320)

• playground: add code formatting output (#1326)

Changed

• parser: split bit & time type ast nodes (#1297)
• parser: add nodes for interval & array bounds (#1301)
• parser: improve parsing of operators in using and exclude (#1304)
• parser: refactor percent type out of ast::Type (#1318)
• parser: refactor char type into character and varchar nodes (#1295)

Fixed

• syntax: fix unquoting & add more funcs (#1298)