feat: add type-safe infix parameter validation & separate test TypeScript config

[tharropoulos]

TLDR

Added compile-time validation for infix parameters and separate TypeScript config for tests.

Change Summary

Added Features:

1. New Type Utilities in Types.ts:

   • CommaSeparated<T, ToExtend>: Validates comma-separated strings against allowed values at compile time
   • TrimString<S>: Helper type for handling whitespace in string validation

2. Type-Safe Infix Parameter in Search APIs:

   • Enhanced SearchParams<TDoc, Infix> with generic Infix parameter for compile-time validation
   • Updated all search-related interfaces to support typed infix validation

3. Separate Test Configuration:

   • tsconfig.test.json: Extends base config to include both source and test files
   • typecheck script: Validates test files without emitting output

Code Changes:

1. In Types.ts:

   • Added CommaSeparated utility type that recursively validates comma-separated operation modes
   • Modified SearchParams interface to accept generic Infix parameter with compile-time validation
   • Updated all multi-search and preset interfaces to support the new type system

2. In Utils.ts:

   • Updated normalizeArrayableParams function to handle the new generic Infix parameter
   • Enhanced type guards to work with the expanded type system

3. In Search-Related Classes:

   • SearchOnlyDocuments.ts: Added generic Infix parameter to search method
   • MultiSearch.ts: Updated all perform method overloads with type-safe infix support
   • Keys.ts: Enhanced scoped search key generation with infix validation
   • Presets.ts: Updated preset creation to support typed infix parameters

4. In package.json:

   • Added typecheck script for validating TypeScript without compilation

Tests :

1. In test/infix.type.test.ts:
   • Added type tests for CommaSeparated utility

[jasonbosco]

Released in v2.1.0-6