[Feature] Fix TypeScript config compatibility issues for TS 6

[EmmaYuan1015]

[Summary]

The repository currently has TypeScript configuration issues that surface with newer TypeScript versions.

Problems observed:

• root tsconfig uses a deprecated moduleResolution setting path and still suppresses deprecations only up to 5.0

• smoke test tsconfig does not explicitly define rootDir, which causes source layout warnings in newer TypeScript versions

• root tsconfig is compatible with current TypeScript diagnostics

• smoke test tsconfig explicitly defines its source root

• smoke test compilation continues to pass without configuration warnings

Scope:

• update ignoreDeprecations in the root tsconfig
• add explicit rootDir for smoke tests
• narrow smoke test source inclusion if needed to avoid layout ambiguity