Adds a codemod for moving from `chalk` to `picocolors`.

This will throw if exports are encountered which picocolors doesn't
provide. For example, as of writing this, picocolors doesn't support
bright colours (but soon will). That means `chalk.redBright` will throw
since picocolors has no `redBright` export.

These patterns are supported:

```ts

// Before
chalk.red.bold(str);
// After
pc.red(pc.bold(str));

// Before
chalk.red`i am red`;
// After
pc.red(`i am red`);

// Before
chalk.red`i am red and ${chalk.bold('bold')}!`;
// After
pc.red(`i am red and ${pc.bold('bold')}!`);
```

Some patterns will not be detected. For example:

```ts
// Not detected since it isn't a call expression
chalk.red;

// Similarly not detected
const red = chalk.red;
red(str);
```