feat(prefer-user-event-setup): add new rule

[gipcompany]

Checks

• I have read the contributing guidelines.

Changes

• Add prefer-user-event-setup rule to encourage using userEvent.setup() pattern over direct method calls
• Add comprehensive test coverage with 44 test cases covering various usage scenarios
• Add documentation explaining the rule benefits and correct usage patterns
• Update README.md with new rule entry in supported rules table

Context

Closes #646

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
15245	1	15244	0

View the top 1 failed test(s) by shortest run time

tests/index.test.ts > should export all existing rules

Stack Traces | 0.0106s run time

AssertionError: expected [ 'await-async-events', …(27) ] to include 'prefer-user-event-setup'
 ❯ tests/index.test.ts:18:21
 ❯ tests/index.test.ts:17:13

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[Belco90]

@gipcompany thanks for your contribution! Great implementation and test cases, just added some minor comments.