Refactor progress bar header and update interval in examples for consistency

Author: ZenanH

README.md

@@ -32,7 +32,7 @@ using SimulationLogging
 # Create a progress bar
 prog = MiniProgressBar(
     max = 100,
-    header = "Processing",
+    header = "processing",
     color = :green,
     update_interval = 1.0  # Update every second
 )
@@ -55,7 +55,11 @@ end_progress(stdout, prog)
 
 **Output:**
 ```
-    Processing ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 00:00:05 s
+[ Info: processing ━━━━━━━━━━━━━━━━╺━━━━━━━━━━━━━━━━━━━━━━━ 41% ETA: 00:00:03 s
+
+... (refresh in-place)
+
+[ Info: processing ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Time: 00:00:05 s
 ```
 
 ## API Reference

test/test.jl

@@ -1,13 +1,23 @@
 using SimulationLogging
 
-pb = MiniProgressBar(max=100, header="solving", color=:green, width=38, update_interval=0.1)
+prog = MiniProgressBar(
+    max = 100,
+    header = "processing",
+    color = :green,
+    update_interval = 1.0  # Update every second
+)
 
-@info "text before for the test"
-start_progress(stdout, pb)
+# Start tracking progress
+start_progress(stdout, prog)
+
+# Update progress in your loop
 for i in 1:100
-    pb.current = i
-    show_progress(stdout, pb)
-    sleep(0.1)  # Simulate work
+    prog.current = i
+    show_progress(stdout, prog)
+    
+    # Your computation here
+    sleep(0.05)
 end
-end_progress(stdout, pb)
-@info "text after for the test"
+
+# Finish and show final result
+end_progress(stdout, prog)