feat: add DMED comparador library with TXT and XLS processing

- Implemented TXT processor for DMED files, extracting RPPSS records.
- Added XLS processor for Prosoft reports, supporting both XLS and XLSX formats.
- Created a comparison tool to identify discrepancies between TXT and XLS data.
- Developed a GUI using eframe for user-friendly interaction.
- Included detailed README documentation for setup and usage instructions.
- Added error handling for file processing and improved data extraction methods.
- Implemented tests for data processing functions and utilities.
- Introduced a build script for Windows resource management.
- Added example scripts for basic and complete comparisons.
- Included a report generation feature for discrepancies found during comparisons.

Cargo.toml

@@ -7,6 +7,21 @@ edition = "2021"
 name = "dmed"
 path = "src/lib.rs"
 
+[[bin]]
+name = "gui"
+path = "src/bin/gui.rs"
+
 [dependencies]
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
+calamine = "0.26"
+encoding_rs = "0.8"
+eframe = "0.29"
+egui = "0.29"
+rfd = "0.15"
+
+[build-dependencies]
+winres = "0.1"
+
+[dev-dependencies]
+chrono = "0.4"