feat: adds devcontainer for asdf-plugin

.devcontainer/devcontainer.json

@@ -0,0 +1,15 @@
+{
+    "name": "Asdf Dev Container",
+    // Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+    "image": "iloveitaly/asdf-devcontainer:bullseye"
+    // Features to add to the dev container. More info: https://containers.dev/features.
+    // "features": {},
+    // Use 'forwardPorts' to make a list of ports inside the container available locally.
+    // "forwardPorts": [],
+    // Use 'postCreateCommand' to run commands after the container is created.
+    // "postCreateCommand": "uname -a",
+    // Configure tool-specific properties.
+    // "customizations": {},
+    // Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+    // "remoteUser": "root"
+}