add devcontainer and cleanup build

Author: iantrich

.devcontainer/configuration.yaml

@@ -0,0 +1,4 @@
+default_config:
+lovelace:
+  mode: yaml
+demo:

.devcontainer/devcontainer.json

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+// See https://aka.ms/vscode-remote/devcontainer.json for format details.
+{
+  "name": "Radial Menu Element Development",
+  "image": "ludeeus/devcontainer:monster-stable",
+  "context": "..",
+  "appPort": ["5000:5000", "9123:8123"],
+  "postCreateCommand": "npm install",
+  "runArgs": [
+    "-v",
+    "${env:HOME}${env:USERPROFILE}/.ssh:/tmp/.ssh" // This is added so you can push from inside the container
+  ],
+  "extensions": [
+    "github.vscode-pull-request-github",
+    "eamodio.gitlens",
+    "dbaeumer.vscode-eslint",
+    "esbenp.prettier-vscode",
+    "bierner.lit-html",
+    "runem.lit-plugin",
+    "auchenberg.vscode-browser-preview",
+    "davidanson.vscode-markdownlint",
+    "redhat.vscode-yaml"
+  ],
+  "settings": {
+    "files.eol": "\n",
+    "editor.tabSize": 4,
+    "terminal.integrated.shell.linux": "/bin/bash",
+    "editor.formatOnPaste": false,
+    "editor.formatOnSave": true,
+    "editor.formatOnType": true,
+    "files.trimTrailingWhitespace": true
+  }
+}

.devcontainer/ui-lovelace.yaml

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+resources:
+  - url: http://127.0.0.1:5000/radial-menu.js
+    type: module
+views:
+  - cards:
+      - type: custom:radial-menu
+        icon: mdi:home
+        name: Home
+        default_open: true
+        default_dismiss: false
+        hold_action:
+          action: url
+          url: https://www.home-assistant.io
+        items:
+          - entity: light.bed_light
+            icon: mdi:flash
+            name: Bedroom Light
+            tap_action:
+              action: toggle
+              haptic: true
+            hold_action:
+              action: more-info
+          - entity: alarm_control_panel.ha_alarm
+            icon: mdi:alarm-light
+            name: Alarm Panel
+            tap_action:
+              action: more-info
+          - icon: mdi:alarm
+            name: Timer
+            tap_action:
+              action: call-service
+              service: timer.start
+              service_data:
+                entity_id: timer.laundry
+              haptic: true
+            hold_action:
+              action: call-service
+              service: timer.pause
+              service_data:
+                entity_id: timer.laundry
+              haptic: true

.eslintrc.js

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+module.exports = {
+    parser: '@typescript-eslint/parser',  // Specifies the ESLint parser
+    extends: [
+        'plugin:@typescript-eslint/recommended',  // Uses the recommended rules from the @typescript-eslint/eslint-plugin
+        'prettier/@typescript-eslint',  // Uses eslint-config-prettier to disable ESLint rules from @typescript-eslint/eslint-plugin that would conflict with prettier
+        'plugin:prettier/recommended',  // Enables eslint-plugin-prettier and displays prettier errors as ESLint errors. Make sure this is always the last configuration in the extends array.
+    ],
+    parserOptions: {
+        ecmaVersion: 2018,  // Allows for the parsing of modern ECMAScript features
+        sourceType: 'module',  // Allows for the use of imports
+        experimentalDecorators: true,
+    },
+    rules: {
+        "@typescript-eslint/camelcase": 0
+    }
+};

.eslintrc.yaml

@@ -1,2 +1,3 @@
 /node_modules/
-.rpt2_cache/
+/.rpt2_cache/
+package-lock.json

.gitignore

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+module.exports = {
+    semi: true,
+    trailingComma: 'all',
+    singleQuote: true,
+    printWidth: 120,
+    tabWidth: 2,
+};