feat!: Implement QuerySingle.

[driessamyn]

Implement the QuerySingle API which returns a single query result or null if none found. The API returns a KapperResultException of more than one results are found.

[driessamyn]

@CodiumAI-Agent /review

[CodiumAI-Agent]

PR Reviewer Guide 🔍

(Review updated until commit 2c923d1)

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 4 🔵🔵🔵🔵⚪

🧪 PR contains tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Code Clarity The test cases are extensive but could benefit from more comments explaining the purpose and expected outcomes of each test, especially for complex scenarios. Redundancy There seems to be redundant code in the query and querySingle methods. Consider refactoring to reduce duplication and improve maintainability.

[github-actions]

Test Results

 7 files  + 1   7 suites  +1   3s ⏱️ -1s
25 tests + 2  23 ✅ + 2  2 💤 ±0  0 ❌ ±0 
51 runs  +16  49 ✅ +16  2 💤 ±0  0 ❌ ±0 

Results for commit 2c923d1. ± Comparison against base commit 52d4e17.

[github-actions]

Code Coverage

File	Coverage [91.49%]
lib/src/integrationTest/kotlin/net/samyn/kapper/QuerySingleTests.kt	96.39%
lib/src/main/kotlin/net/samyn/kapper/Exceptions.kt	100.00%
lib/src/main/kotlin/net/samyn/kapper/Kapper.kt	64.71%
lib/src/main/kotlin/net/samyn/kapper/internal/KapperImpl.kt	90.91%

Total Project Coverage	92.13%

[CodiumAI-Agent]

Persistent review updated to latest commit 2c923d1