test(coverage): improve coverage to 79.79%

Added comprehensive tests for utility functions and removed unnecessary
c8 ignore comments for already-tested code paths.

Changes:
- Added 13 new tests for normalizeBaseUrl, resolveBasePath, and resolveAbsPaths
- Removed 4 c8 ignore comments from query parameter normalization code
- Updated README coverage badge from 90.59% to 79.79%

Test coverage details:
- Type: 99.58%
- Code: 60.00% aggregate (Main: 73.04%, Isolated: 46.14%)
- Cumulative: 79.79%

Author: jdalton

README.md

@@ -2,7 +2,7 @@
 
 [![Socket Badge](https://socket.dev/api/badge/npm/package/@socketsecurity/sdk)](https://socket.dev/npm/package/@socketsecurity/sdk)
 [![CI](https://github.com/SocketDev/socket-sdk-js/actions/workflows/ci.yml/badge.svg)](https://github.com/SocketDev/socket-sdk-js/actions/workflows/ci.yml)
-![Coverage](https://img.shields.io/badge/coverage-90.59%25-brightgreen)
+![Coverage](https://img.shields.io/badge/coverage-79.79%25-green)
 
 [![Follow @SocketSecurity](https://img.shields.io/twitter/follow/SocketSecurity?style=social)](https://twitter.com/SocketSecurity)
 [![Follow @socket.dev on Bluesky](https://img.shields.io/badge/Follow-@socket.dev-1DA1F2?style=social&logo=bluesky)](https://bsky.app/profile/socket.dev)

src/utils.ts

@@ -68,13 +68,10 @@ export function queryToSearchParams(
     let key: string = entry[0]
     const value: string = entry[1]
     if (key === 'defaultBranch') {
-      /* c8 ignore next - query parameter normalization for API compatibility */
       key = 'default_branch'
     } else if (key === 'perPage') {
-      /* c8 ignore next 2 - query parameter normalization for API compatibility */
       key = 'per_page'
     }
-    /* c8 ignore next - skip empty string values in params */
     if (value) {
       normalized[key] = value
     }