Add package.json, tsconfig.json, and change gitignore

.gitignore

@@ -46,6 +46,10 @@ Packages
 wally.lock
 WallyPatches
 
+# Typescript
+/node_modules
+/include
+
 # Misc
 roblox.toml
 sourcemap.json

package.json

@@ -0,0 +1,43 @@
+{
+  "name": "@rbxts/jecs",
+  "version": "0.1.0",
+  "description": "Stupidly fast Entity Component System",
+  "main": "lib/init.lua",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/ukendio/jecs.git"
+  },
+  "scripts": {
+    "build": "rbxtsc",
+    "watch": "rbxtsc -w",
+    "prepublishOnly": "npm run build"
+  },
+  "keywords": [],
+  "author": "Ukendio",
+  "contributors": [
+    "Ukendio",
+    "EncodedVenom"
+  ],
+  "homepage": "https://github.com/ukendio/jecs",
+  "license": "MIT",
+  "types": "lib/index.d.ts",
+  "files": [
+    "lib/"
+  ],
+  "publishConfig": {
+    "access": "public"
+  },
+  "devDependencies": {
+    "@rbxts/compiler-types": "github:roblox-ts/compiler-types",
+    "@rbxts/types": "^1.0.558",
+    "@typescript-eslint/eslint-plugin": "^5.8.0",
+    "@typescript-eslint/parser": "^5.8.0",
+    "eslint": "^8.5.0",
+    "eslint-config-prettier": "^8.3.0",
+    "eslint-plugin-prettier": "^4.0.0",
+    "eslint-plugin-roblox-ts": "^0.0.32",
+    "prettier": "^2.5.1",
+    "roblox-ts": "^1.3.3-dev-5633519",
+    "typescript": "^4.5.4"
+  }
+}

tsconfig.json

@@ -0,0 +1,26 @@
+{
+    "compilerOptions": {
+      // required
+      "allowSyntheticDefaultImports": true,
+      "downlevelIteration": true,
+      "jsx": "react",
+      "jsxFactory": "Roact.createElement",
+      "jsxFragmentFactory": "Roact.Fragment",
+      "module": "commonjs",
+      "moduleResolution": "Node",
+      "noLib": true,
+      "resolveJsonModule": true,
+      "strict": true,
+      "target": "ESNext",
+      "typeRoots": ["node_modules/@rbxts"],
+  
+      // configurable
+      "rootDir": "lib",
+      "outDir": "out",
+      "baseUrl": "lib",
+      "incremental": true,
+      "tsBuildInfoFile": "out/tsconfig.tsbuildinfo",
+  
+      "moduleDetection": "force"
+    }
+  }