workspace: Add digibyte.code-workspace for VS Code configuration

This commit adds a new `digibyte.code-workspace` file to the repository. This file is used to configure the Visual Studio Code workspace settings for the DigiByte Core project.

The `digibyte.code-workspace` file includes:
- Folder settings for the project.
- File associations to ensure proper syntax highlighting for various C++ standard library headers.
- GitHub Copilot advanced settings to specify project directories.

This addition aims to improve the development experience for contributors using Visual Studio Code by providing a pre-configured workspace setup.

digibyte.code-workspace

@@ -0,0 +1,58 @@
+{
+	"folders": [
+		{
+			"path": "."
+		}
+	],
+	"settings": {
+		"files.associations": {
+			"chrono": "cpp",
+			"initializer_list": "cpp",
+			"cctype": "cpp",
+			"cmath": "cpp",
+			"csignal": "cpp",
+			"cstdarg": "cpp",
+			"cstddef": "cpp",
+			"cstdio": "cpp",
+			"cstdlib": "cpp",
+			"cstring": "cpp",
+			"ctime": "cpp",
+			"cwchar": "cpp",
+			"cwctype": "cpp",
+			"atomic": "cpp",
+			"strstream": "cpp",
+			"condition_variable": "cpp",
+			"cstdint": "cpp",
+			"future": "cpp",
+			"iosfwd": "cpp",
+			"mutex": "cpp",
+			"ratio": "cpp",
+			"system_error": "cpp",
+			"thread": "cpp",
+			"cinttypes": "cpp",
+			"typeindex": "cpp",
+			"ios": "cpp"
+		},
+		"github.copilot.advanced": {
+			"projectDirectories": [
+				".github",
+				"src",
+				"test",
+				"doc",
+				"qa"
+			],
+			"excludeDirectories": [
+				"**/.deps",
+				"**/.libs",
+				"**/.obj"
+			],
+			"excludeFiles": [
+				"*.a",
+				"*.o",
+				"*.Po",
+				"*.pc",
+				"*.log",
+			]
+		}
+	}
+}