chore: use concurrently for the build process

concurrently allows running independent tasks in parallel in different
node.js processes. This can reduce execution time drastically. In my
machine it reduces the `npm run check` command execution time to
a half.

```
Without concurrently:
real	0m20.025s
user	0m41.886s
sys	0m1.882s

With concurrently:
real	0m9.910s
user	0m59.061s
sys	0m2.201s
```

Author: kmruiz

package-lock.json

@@ -37,14 +37,13 @@
     "prepare": "npm run build",
     "build:clean": "rm -rf dist",
     "build:update-package-version": "tsx scripts/updatePackageVersion.ts",
-    "build:esm": "tsc --project tsconfig.esm.json",
+    "build:esm": "tsc --project tsconfig.esm.json && chmod +x dist/esm/index.js",
     "build:cjs": "tsc --project tsconfig.cjs.json",
     "build:universal-package": "tsx scripts/createUniversalPackage.ts",
-    "build:chmod": "chmod +x dist/esm/index.js",
-    "build": "npm run build:clean && npm run build:esm && npm run build:cjs && npm run build:universal-package && npm run build:chmod",
+    "build": "npm run build:clean && concurrently 'npm run build:esm' 'npm run build:cjs' 'npm run build:universal-package'",
     "inspect": "npm run build && mcp-inspector -- dist/esm/index.js",
     "prettier": "prettier",
-    "check": "npm run build && npm run check:types && npm run check:lint && npm run check:format && npm run check:dependencies",
+    "check": "concurrently 'npm run build' 'npm run check:types' 'npm run check:lint' 'npm run check:format' 'npm run check:dependencies'",
     "check:lint": "eslint .",
     "check:dependencies": "knip --strict",
     "check:format": "prettier -c .",