feat(kleur-to-util-styletext): add codemod

[GiHoon1123]

Fixes #479.

Summary

Adds a codemod that migrates kleur to node:util's styleText(), following the same shape as the existing chalk-to-util-styletext recipe. kleur's API is basically a subset of chalk's (chainable style methods, direct calls), so this is adapted from that recipe rather than written from scratch.

kleur's real API is smaller than chalk's - no hex()/rgb()/ansi256(), no "Bright" color variants, no chalkStderr. Every method kleur actually ships has a direct styleText equivalent, so there's nothing left unsupported by design (the unsupported-method guard is kept anyway, in case a future kleur version adds something new).

Examples

- import kleur from 'kleur';
+ import { styleText } from 'node:util';
- console.log(kleur.red('Error message'));
+ console.log(styleText('red', 'Error message'));

- import kleur from 'kleur';
+ import { styleText } from 'node:util';
- console.log(kleur.red.bold('Important error'));
+ console.log(styleText(['red', 'bold'], 'Important error'));

- const kleur = require('kleur');
+ const { styleText } = require('node:util');
- const red = kleur.red;
+ const red = (text) => styleText('red', text);

Changes

• recipes/kleur-to-util-styletext/src/workflow.ts: main transform. Handles default import/require, named/destructured imports, dynamic import, chained calls (up to 4 styles), method assignment to a variable, and ternary-based style selection.
• recipes/kleur-to-util-styletext/src/remove-dependencies.ts: removes kleur from package.json (no @types/kleur exists, kleur ships its own types).
• 18 workflow tests + 1 remove-dependencies test, covering the different import styles kleur can be used with.
• README.md documents one real limitation: direct calls chaining more than 4 styles (kleur.a.b.c.d.e(...)) aren't transformed and are left as-is (no crash, just a no-op). Chaining through a variable assignment first isn't affected by this - only direct calls are.

Test plan

• node --run test:workflow - 18/18 passing
• node --run test:remove-dependencies - 1/1 passing
• node --run pre-commit (lint + type-check + full workspace test suite) passes