Refactor project structure and update dependencies

- Updated .gitignore to exclude virtual environment and additional test files.
- Modified diligent_jstk.bd to reorganize interface nets for clarity.
- Adjusted diligent_jstk.bda to correct node attributes and edges.
- Revised diligent_jstk_wrapper.vhd to ensure proper port declarations.
- Enhanced uart_viewer.py for improved image handling and serial connection checks.
- Updated diligent_jstk.xpr and lab3.xpr for correct file paths and run configurations.
- Added requirements.txt to specify project dependencies for Python packages.

.gitignore

@@ -45,7 +45,6 @@
 *.bxml
 *.zip
 
-
 # Vivado project directories
 *.sim/
 *.cache/
@@ -65,6 +64,8 @@ vivado_pid*.str
 vivado*.backup.jou
 vivado*.backup.log
 
+# Directories to ignore
+.venv
 
 # SDK workspace
 .sdk/
@@ -79,4 +80,8 @@ vivado*.backup.log
 **/design/**/*.xdc
 
 # Other files
-**/test/*.zip
+**/test/*.zip
+**/test/*.exe
+**/test/*.spec
+**/test/dist/
+**/test/build/