chore(devenv): update VS Code extensions for improved development experience

Author: rocketstack-matt

.devcontainer/devcontainer.json

@@ -18,8 +18,37 @@
 	"customizations": {
 		"vscode": {
 			"extensions": [
-				"vscjava.vscode-java-pack"
-			]
+                "astro-build.astro-vscode",
+                "bierner.markdown-mermaid",
+                "davidanson.vscode-markdownlint",
+                "esbenp.prettier-vscode",
+                "finos.calm-vscode-plugin",
+                "github.codespaces",
+                "github.copilot",
+                "github.copilot-chat",
+                "github.github-vscode-theme",
+                "github.remotehub",
+                "github.vscode-github-actions",
+                "github.vscode-pull-request-github",
+                "mermaidchart.vscode-mermaid-chart",
+                "mhutchie.git-graph",
+                "michelemelluso.gitignore",
+                "ms-vscode-remote.remote-containers",
+                "ms-vscode.remote-repositories",
+                "ms-vscode.vscode-speech",
+                "redhat.java",
+                "redhat.vscode-yaml",
+                "systemticks.c4-dsl-extension",
+                "tintinweb.graphviz-interactive-preview",
+                "unifiedjs.vscode-mdx",
+                "vscjava.vscode-gradle",
+                "vscjava.vscode-java-debug",
+                "vscjava.vscode-java-dependency",
+                "vscjava.vscode-java-pack",
+                "vscjava.vscode-java-test",
+                "vscjava.vscode-java-upgrade",
+                "vscjava.vscode-maven"
+            ]
 		}
 	}
 }