feat: added npm workspaces support (#4)

Description
===========
  - Introduced npm workspaces to manage
    CLI tests from the root directory.
  - Enabled simplified npm dependency
    installation from the root.
  - Updated .gitignore to align with
    the new workspace structure.

Usage
=====

From the root directory

To install repo npm packages, run:
```
npm install && npm fund
```

To run related tests, run:
```
npm run test:cli
```

.gitignore

@@ -8,3 +8,7 @@
 /*.s
 /llvm-project
 /llvm18.0
+node_modules
+artifacts
+tmp
+package-lock.json

package.json

@@ -0,0 +1,10 @@
+{
+    "name": "root",
+    "private": true,
+    "scripts": {
+        "test:cli": "npm run test -w crates/solidity/src/tests/cli-tests"
+    },
+    "workspaces": [
+        "crates/solidity/src/tests/cli-tests"
+    ]
+}