Fixes #337 : multiple fixes in the code and modernize the style

.eslintrc.cjs

@@ -0,0 +1,63 @@
+module.exports = {
+  root: true,
+  env: {
+    browser: true,
+    es2021: true,
+    node: true
+  },
+  extends: [
+    'standard',
+    'eslint:recommended',
+    'plugin:@typescript-eslint/recommended'
+  ],
+  parser: '@typescript-eslint/parser',
+  parserOptions: {
+    ecmaVersion: 'latest',
+    sourceType: 'module',
+    project: ['./tsconfig.json', './tsconfig.www.json'] // Include both TypeScript configs
+  },
+  plugins: ['@typescript-eslint'],
+  rules: {
+    'arrow-body-style': ['error', 'as-needed'],
+    'func-style': ['error', 'expression'],
+    semi: ['error', 'always'],
+    quotes: ['error', 'single'],
+    indent: ['error', 2],
+    'brace-style': ['error', '1tbs'],
+    'no-var': 'error',
+    'prefer-const': 'error',
+    '@typescript-eslint/no-explicit-any': 'warn',
+    'no-unused-vars': 'off', // Turn off the base rule as it can report incorrect errors
+    '@typescript-eslint/no-unused-vars': ['warn', {
+      argsIgnorePattern: '^_',
+      varsIgnorePattern: '^_',
+      caughtErrorsIgnorePattern: '^_'
+    }],
+    'no-empty-function': 'off',
+    '@typescript-eslint/no-empty-function': 'off'
+  },
+  overrides: [
+    {
+      files: ['.eslintrc.cjs', 'vite.config.js', 'vite.worker.config.js', 'scripts/*', 'www/lib/*'],
+      env: {
+        node: true
+      },
+      parserOptions: {
+        sourceType: 'script',
+        project: null // Disable TypeScript parsing for these files
+      }
+    },
+    {
+      files: ['www/**/*.js', 'www/**/*.ts'],
+      parserOptions: {
+        project: './tsconfig.www.json' // Use tsconfig.www.json for files in the www directory
+      }
+    },
+    {
+      files: ['src/**/*.ts'],
+      parserOptions: {
+        project: './tsconfig.json' // Use main tsconfig.json for files in the src directory
+      }
+    }
+  ]
+};

.gitignore

@@ -45,4 +45,6 @@ dist/*.min.js
 dist/tensorflow.js
 dist/tensorflow.commonjs2.js
 www/trainingData/*.png
-www/trainingData/*.db
+www/trainingData/*.db
+www/lib/*
+!www/lib/d3.v3.min.js