AI Dev Tool: Things I want in

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Preview Code

```rust
// AI Dev Tool: Modern Relational Query Language Starter
// Description: A production-ready starter boilerplate for building modern relational query languages
// Category: Production Starter Boilerplate
// Tags: relational query language, modern, starter boilerplate

use std::error::Error;
use std::fmt;

// Define a custom error type for the query language
#[derive(Debug)]
enum QueryError {
    InvalidSyntax,
    UnknownTable,
    InvalidColumn,
}

impl fmt::Display for QueryError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match *self {
            QueryError::InvalidSyntax => write!(f, "Invalid syntax"),
            QueryError::UnknownTable => write!(f, "Unknown table"),
            QueryError::InvalidColumn => write!(f, "Invalid column"),
        }
    }
# ... full runnable version includes tests & documentation