build(deps-dev): bump typescript from 5.9.3 to 6.0.3

[dependabot]

Bumps typescript from 5.9.3 to 6.0.3.

Also upgrades related dependencies for TypeScript 6 compatibility:

• @typescript-eslint/eslint-plugin from ^8.57.1 to ^8.60.0 (supports TS <6.1.0)
• @typescript-eslint/parser from ^8.59.1 to ^8.60.0
• ts-jest from ^29.4.6 to ^29.4.11 (supports TS <7)
• Removes deprecated downlevelIteration tsconfig option (not needed for ES2016+ target)
• Adds explicit rootDir to tsconfig (required by TypeScript 6)

> Note
> Automatic rebases have been disabled on this pull request as it has been open for over 30 days.

[yoganandaness]

@copilot make sure all the checks passes. Analyse the failed checks and fix them

[Copilot]

@copilot make sure all the checks passes. Analyse the failed checks and fix them

Fixed in commit f4cc6a7. The CI failures were caused by peer dependency conflicts with TypeScript 6.0.3:

1. @typescript-eslint/eslint-plugin@8.57.1 required typescript < 6.0.0 → upgraded to ^8.60.0 (supports < 6.1.0)
2. @typescript-eslint/parser → upgraded to ^8.60.0 to match
3. ts-jest@29.4.6 required typescript < 6 → upgraded to ^29.4.11 (supports < 7)
4. tsconfig.json: removed deprecated downlevelIteration option and added explicit rootDir (both required by TypeScript 6)

All lint, build, and 141 tests pass locally.

[Copilot]

Pull request overview

This PR upgrades the TypeScript toolchain to TypeScript 6 and aligns related linting/testing dependencies and compiler configuration to remain compatible with the new compiler version.

Changes:

• Bump typescript to ^6.0.3 and update @typescript-eslint/* to ^8.60.0.
• Bump ts-jest to ^29.4.11 to keep Jest/TS integration compatible.
• Update tsconfig.json to set an explicit rootDir and stop using downlevelIteration.

Reviewed changes

Copilot reviewed 1 out of 3 changed files in this pull request and generated no comments.

File	Description
tsconfig.json	Sets explicit rootDir and disables downlevelIteration to match TS6 expectations.
package.json	Updates TypeScript and related dev dependencies for TS6 compatibility.
package-lock.json	Locks the updated dependency graph for the new TypeScript and tooling versions.

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