more validation tests for gemma video rendering

Adds 'doom like' 3dviprmaze-vip for demo (VERY VERY SLOW)
updates egui interface to let user select from files in resources/roms
updates cargo to centralize dependencies
95 passing tests

gemmaimgui/Cargo.toml

@@ -5,16 +5,15 @@ edition = "2021"
 
 [dependencies]
 gemma = { path = "../gemma" }
-glium = { version = "0.34.0", default-features = true }
-image = "0.23"
-imgui = { version ="0.12.0", features = ["tables-api"] }
-imgui-glium-renderer = { version = "0.12.0" }
-imgui-winit-support = { version = "0.12.0" }
-winit = { version = "0.27", features = ["x11", "mint"] }
-pretty_env_logger = "0.5.0"
-copypasta = "0.8"
-rand = "0.9.0-alpha.2"
-log = "0.4.22"
-beep = "0.3.0"
-chrono = "0.4.38"
-dimensioned = "0.8.0"
+glium.workspace = true
+image.workspace = true
+imgui.workspace = true
+imgui-glium-renderer.workspace = true
+imgui-winit-support.workspace = true
+winit.workspace = true
+pretty_env_logger.workspace = true
+copypasta.workspace = true
+rand.workspace = true
+log.workspace = true
+chrono.workspace = true
+dimensioned.workspace = true

gemmaimgui/src/bin/support/emmagui_support.rs

@@ -100,6 +100,9 @@ impl GemmaImguiSupport {
         ui.window("!!!! CONTROLS !!!!")
             .size([345.0, 200.0], Condition::FirstUseEver)
             .build(|| {
+                /* System Step Counter */
+                ui.text(format!("Step {:04x}", system_to_control.num_cycles).as_str());
+
                 /* ROM Lister */
                 let new_filename = GuiFileList::display_path(PathBuf::from("resources/roms"), &gui_state.filename_to_load, ui);
                 if !new_filename.is_empty() {
@@ -137,7 +140,7 @@ impl GemmaImguiSupport {
                     *system_to_control = Chip8Computer::new();
                 }
                 if ui.button("Dump Video Memory") {
-                    debug!("{}", system_to_control.dump_video_to_string());
+                    println!("{}", system_to_control.dump_video_to_string());
                 }
                 ui.same_line();
                 if ui.button("Dump Keypad State") {