feat: add basic error factory

.gitignore

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+*.log
+
+/lib
+/node_modules

.oxfmtrc.json

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+{
+  "$schema": "./node_modules/oxfmt/configuration_schema.json",
+  "ignorePatterns": []
+}

package.json

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+{
+  "name": "coded-exception",
+  "version": "1.0.0",
+  "description": "",
+  "keywords": [],
+  "license": "Unlicense",
+  "author": "Leonard Kinday <leonard@kinday.se> (https://leonard.kinday.se/)",
+  "type": "module",
+  "main": "lib/index.js",
+  "exports": {
+    "types": "./lib/index.d.ts",
+    "default": "./lib/index.js"
+  },
+  "scripts": {
+    "build": "tsc",
+    "conform:format": "oxfmt --no-error-on-unmatched-pattern",
+    "conform:source": "oxlint --fix",
+    "conform": "concurrently 'pnpm:conform:*'",
+    "test:format": "oxfmt --check --no-error-on-unmatched-pattern",
+    "test:source": "oxlint",
+    "test:size": "size-limit",
+    "test": "concurrently 'pnpm:test:*'"
+  },
+  "devDependencies": {
+    "@size-limit/preset-small-lib": "12.1.0",
+    "@tsconfig/node-lts": "~24.0.0",
+    "concurrently": "9.2.1",
+    "oxfmt": "0.48.0",
+    "oxlint": "1.63.0",
+    "size-limit": "12.1.0",
+    "typescript": "6.0.3"
+  },
+  "size-limit": [
+    {
+      "path": "lib/index.js",
+      "limit": "512 B"
+    }
+  ],
+  "packageManager": "pnpm@11.1.2+sha512.415a1cc25974731e75455c1468371be74c5aa5fb7621b50d4056d222451609f11412f23fd602e6169f1e060466641f798597e1be961a10688836a67b16569499"
+}

pnpm-workspace.yaml

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+allowBuilds:
+  esbuild: true
+  simple-git-hooks: true
+minimumReleaseAge: 10080 # 7 days
+overrides:
+  coded-exception: "link:"
+savePrefix: ""
+useStderr: true

src/index.ts

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+export interface ErrorCode {
+  message: string;
+}
+
+export function createError<Name extends string, Codes extends Record<string, ErrorCode>>(
+  name: Name,
+  codes: Codes,
+) {
+  return class extends Error {
+    public code: keyof Codes;
+    public name: Name;
+
+    constructor(code: keyof Codes, cause?: Error) {
+      const { message } = codes[code];
+      super(message);
+      this.cause = cause;
+      this.code = code;
+      this.name = name;
+    }
+  };
+}

tsconfig.json

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+{
+  "extends": "@tsconfig/node-lts",
+  "compilerOptions": {
+    "declaration": true,
+    "outDir": "lib",
+    "rootDir": "src"
+  },
+  "files": ["src/index.ts"]
+}