Initial repository setup and core files added

Add configuration, documentation, code of conduct, contributing guide, license, and README files. Set up .gitignore, coverage config, GitHub issue templates, pull request template, and initial source code, scripts, and tests for DeepLX optimized for Cloudflare Workers.

jest.config.js

@@ -0,0 +1,27 @@
+module.exports = {
+  preset: "ts-jest",
+  testEnvironment: "node",
+  roots: ["<rootDir>/src", "<rootDir>/tests"],
+  testMatch: ["**/__tests__/**/*.ts", "**/?(*.)+(spec|test).ts"],
+  transform: {
+    "^.+\\.ts$": "ts-jest",
+  },
+  collectCoverageFrom: ["src/**/*.ts", "!src/**/*.d.ts", "!src/**/index.ts"],
+  coverageDirectory: "coverage",
+  coverageReporters: ["text", "lcov", "html"],
+  setupFilesAfterEnv: ["<rootDir>/tests/setup.ts"],
+  moduleNameMapping: {
+    "^@/(.*)$": "<rootDir>/src/$1",
+  },
+  testTimeout: 30000,
+  globals: {
+    "ts-jest": {
+      tsconfig: {
+        target: "ES2020",
+        module: "commonjs",
+        lib: ["ES2020", "WebWorker"],
+        types: ["@cloudflare/workers-types", "jest"],
+      },
+    },
+  },
+};