feat(code base): add eslint

add new eslint formatter

.eslintignore

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+Jasmine-Project/

.eslintrc

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+{
+	"extends": [
+		"eslint:recommended",
+		"airbnb-base"
+	],
+	"rules": {
+		"semi": [
+			2,
+			"always"
+		],
+		"no-underscore-dangle": 0,
+		"no-param-reassign": 0,
+		"max-classes-per-file": 0,
+		"no-unused-vars": 0,
+		"no-undef": 0,
+		"no-console": 0,
+		"no-prototype-builtins": 0,
+	},
+	"parserOptions": {
+		"ecmaVersion": 2020,
+		"sourceType": "module"
+	},
+	"env": {
+		"browser": true,
+		"node": true,
+		"es6": true
+	},
+	"globals": {
+		"buildfire": true,
+		"Setting": true,
+		"AuthManager": true,
+		"state": true,
+		"getLanguage": true,
+		"Settings": true,
+		"AnalyticsManager": true
+	}
+}

package.json

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+{
+  "name": "leaderboardPlugin",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "build": "gulp && cd ../ && rm -rf leaderboardPlugin.zip && zip -r leaderboardPlugin.zip leaderboardPlugin_release && rm -rf leaderboardPlugin_release",
+    "lint": "eslint --fix ."
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/BuildFire/leaderboardPlugin.git"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "@babel/core": "^7.22.5",
+    "@babel/preset-env": "^7.22.5",
+    "autoprefixer": "^10.4.14",
+    "cssnano": "^6.0.1",
+    "eslint": "^7.2.0",
+    "eslint-config-airbnb-base": "^14.0.0",
+    "eslint-plugin-import": "^2.31.0",
+    "fancy-log": "^2.0.0",
+    "gulp": "^4.0.2",
+    "gulp-babel": "^8.0.0",
+    "gulp-concat": "^2.6.1",
+    "gulp-eslint": "^6.0.0",
+    "gulp-html-replace": "^1.6.2",
+    "gulp-htmlmin": "^5.0.1",
+    "gulp-imagemin": "^3.3.0",
+    "gulp-postcss": "^9.0.1",
+    "gulp-prettier": "^4.0.0",
+    "gulp-print": "^5.0.2",
+    "gulp-terser": "^2.1.0",
+    "rimraf": "^5.0.1"
+  }
+}