feat: support table.* syntax

doc/sql/query.ebnf

sbroad-core/src/executor/engine/helpers.rs

sbroad-core/src/frontend/sql.rs

sbroad-core/src/frontend/sql/ir/tests.rs

sbroad-core/src/frontend/sql/query.pest

sbroad-core/src/ir/expression.rs

sbroad-core/src/ir/expression/tests.rs

sbroad-core/src/ir/operator.rs