Add no-inline-styles lint rule

[danielchen0]

Summary

• Adds no-inline-styles rule that flags style={{...}} JSX attributes and suggests using Tailwind CSS classes instead
• Allows style props with variable references (e.g., style={dynamicStyle})

Test plan

• All existing tests pass
• 6 new tests pass
• TypeScript compiles
• Prettier passes

[arnavsurve]

This is a clean, well-structured PR that follows the existing codebase conventions closely. The rule implementation is correct, the tests are thorough, and the documentation is properly updated.

What looks good:

• The AST traversal logic correctly identifies style={{...}} (inline object expressions) while allowing style={variable} references, which is the right behavior.
• Test coverage is solid: positive cases (single element, different elements, multiple violations), negative cases (className, variable reference, no style prop).
• README table, rule detail section, rule count bump, and test count bump are all updated consistently.
• Code style matches existing rules (e.g., no-tailwind-animation-classes) perfectly.

Minor observations (non-blocking):

• The no-stylesheet-create rule's message says "Use inline styles instead of StyleSheet.create()", while this new rule says "Avoid inline styles. Use Tailwind CSS classes instead." Together they form a logical migration path (StyleSheet.create -> inline -> Tailwind), but the no-stylesheet-create message could be slightly confusing if both rules fire in the same codebase. This is pre-existing and outside the scope of this PR.
• The rule will not flag style={(() => ({ color: 'red' }))()} (IIFE returning an object) or style={{...someSpread}} (spread inside object literal -- this one actually would be caught since it's still an ObjectExpression). These edge cases are reasonable to not worry about since the common pattern is what matters.
• The README intro section still says "all 31 rules" in the config section, but the Available Rules heading correctly says 34. This is also pre-existing.

LGTM!

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