Modernize project: ESM, vitest, eslint 9, prettier 3

- Convert to ESM with type: module and .js import extensions
- Replace mocha/chai/sinon/nyc with vitest and @vitest/coverage-v8
- Upgrade to ESLint 9 flat config with typescript-eslint
- Update to Prettier 3, Husky 9, TypeScript 5
- Update maquette to 4.x, add as peerDependency
- Remove typescript-assistant (tsa) dependency
- Achieve 100% test coverage
- Update tsconfig for ES2022/Node16 module resolution

Author: johan-gorter

.eslintignore

@@ -2,4 +2,5 @@
 build
 node_modules
 dist
+coverage
 /.idea/

.eslintrc.js

@@ -1,4 +1 @@
-#!/bin/sh
-. "$(dirname "$0")/_/husky.sh"
-
-npx --no-install tsa pre-commit
+npm run format && npm run lint

.gitignore

@@ -1,4 +1 @@
-#!/bin/sh
-. "$(dirname "$0")/_/husky.sh"
-
-npm run dist && npx --no-install tsa pre-push
+npm run ci

.husky/post-checkout

@@ -1,6 +1,5 @@
-.idea
-.vscode
+dist
+node_modules
+coverage
 build
-dist
-*.js
-*.md
+package-lock.json

.husky/post-merge

@@ -2,6 +2,5 @@
   "endOfLine": "lf",
   "printWidth": 100,
   "singleQuote": false,
-  "trailingComma": "es5",
-  "parser": "typescript"
+  "trailingComma": "es5"
 }