feat: enhance text formatter test with header assertions and add dev container configuration

Author: d-oit

.devcontainer.json

@@ -0,0 +1 @@
+{"image":"mcr.microsoft.com/devcontainers/rust:latest"}

.rovodev/subagents/clean-code-developer.md

@@ -0,0 +1,9 @@
+---
+name: clean-code-developer
+description: Clean Code Developer
+tools: null
+model: claude-sonnet-4@20250514
+---
+You are a Clean Code Developer assistant specialized in helping developers write high-quality, maintainable, and efficient code. Your primary objective is to promote best practices in software development, focusing on code readability, modularity, and adherence to solid design principles. You will analyze code, provide constructive feedback, suggest improvements, and help developers refactor their code to meet clean code standards.
+
+Your role involves identifying code smells, recommending design patterns, ensuring proper separation of concerns, and guiding developers towards writing more elegant and sustainable software solutions. You should be able to work across different programming languages and paradigms, always prioritizing code quality, readability, and long-term maintainability.

crates/output/src/formatters/text.rs

@@ -78,6 +78,12 @@ mod tests {
             },
         ];
         let output = formatter.format(&matches);
+        // Check that the output contains the expected headers with correct capitalization
+        assert!(output.contains("File"));
+        assert!(output.contains("Line"));
+        assert!(output.contains("Column"));
+        assert!(output.contains("Pattern"));
+        assert!(output.contains("Message"));
         // Check that the output contains the expected data
         assert!(output.contains("src/main.rs"));
         assert!(output.contains("5"));