refactor: Replace Rollup with Vite (#2656)

This is a high risk change: every byte the card ships is emitted by a
different bundler, minified by a different minifier, and every
stylesheet is compiled by a different sass. The intent is that the
card's behaviour is unchanged.

**Significant development win**: Build time drops from 24s to 1.1s 🎉 

Also adds a test suite ('dist') that runs against the built bundle.

.devcontainer/devcontainer.json

@@ -11,10 +11,13 @@
   "workspaceFolder": "${localWorkspaceFolder}",
   "initializeCommand": [".devcontainer/scripts/devcontainer_initialize.sh"],
   "postCreateCommand": ["yarn", "install"],
+  "postAttachCommand": {
+    "preview": "yarn build && yarn preview"
+  },
   "forwardPorts": [10001, "homeassistant:8123", "frigate:5000"],
   "portsAttributes": {
     "10001": {
-      "label": "Rollup",
+      "label": "Vite",
       "onAutoForward": "silent"
     },
     "homeassistant:8123": {