chore(oxfmt): Use strict: true for TS code

[leaysgur]

Just enhancement, will merge after CI.

[leaysgur]

• chore(oxfmt): Use strict: true for TS code #15891 👈 (View in Graphite)
• main

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[Copilot]

Pull Request Overview

This PR enables TypeScript's strict mode for the oxfmt application, replacing the less comprehensive noImplicitAny option. The strict mode includes additional type safety checks such as strictNullChecks, strictFunctionTypes, strictBindCallApply, and others.

• Upgraded TypeScript configuration from noImplicitAny: true to strict: true
• Added nullish coalescing operator to handle potentially undefined exitCode from execa

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
apps/oxfmt/tsconfig.json	Replaced noImplicitAny: true with strict: true to enable comprehensive TypeScript strict type checking
apps/oxfmt/test/utils.ts	Added nullish coalescing operator (?? -1) to handle potentially undefined exitCode from execa, required by strict mode's strictNullChecks

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