Update TypeScript to 6.x in bicep-types-radius generator

[brooke-hamilton]

Summary

The hack/bicep-types-radius/src/generator package currently uses TypeScript 5.x. TypeScript 6.0 has been released but we are not yet ready to upgrade.

Why it's not done yet

TypeScript 6 introduces breaking changes to CJS/ESM module interop that affect our code:

• The default import of yargs is resolved differently under TS 6, requiring a change from yargs to yargs(process.argv.slice(2)) in src/cmd/generate.ts.
• The @typescript-eslint/* packages we depend on declare peerDependencies of typescript: '>=4.8.4 <6.0.0', meaning TS 6 is outside their supported range. We need to wait for @typescript-eslint to release versions that support TS 6.

Current state

Dependabot has been configured to ignore the TypeScript 6.x major version bump (@dependabot ignore this major version for typescript) so it will not attempt to include this upgrade in grouped dependency PRs.

Action items

• Wait for @typescript-eslint/eslint-plugin and @typescript-eslint/parser to support TypeScript 6
• Update yargs usage in src/cmd/generate.ts from yargs to yargs(process.argv.slice(2)) (or update yargs types)
• Test make generate end-to-end with TypeScript 6
• Remove the dependabot ignore rule for typescript once the upgrade is complete

References

• PR where this was discovered: Bump the npm-dependencies group across 3 directories with 17 updates #11515

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[DariuszPorowski]

related: #11467