feat: move to typescript & tidy up some code

.eslintrc.js

@@ -0,0 +1,15 @@
+module.exports = {
+    parser: '@typescript-eslint/parser',  // Specifies the ESLint parser
+    //extends: [
+    //    'prettier',  // 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
+    }
+};

.gitignore

@@ -0,0 +1,94 @@
+dist/*
+!dist/sunsynk-power-flow-card.js
+
+.devcontainer/*
+!.devcontainer/recommended-devcontainer.json
+!.devcontainer/recommended-Dockerfile
+
+.vscode/*
+
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+*.map
+package-lock.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# TypeScript v1 declaration files
+typings/
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+.env.test
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+undefined/
+
+# next.js build output
+.next
+
+# nuxt.js build output
+.nuxt
+
+# vuepress build output
+.vuepress/dist
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+docs/_build

.prettierrc

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+{
+  semi: true,
+  trailingComma: 'all',
+  singleQuote: true,
+  printWidth: 120,
+  useTabs: true,
+  tabWidth: 2
+}