fix(add): Support dist tags in deno add

cli/npm/mod.rs

@@ -124,6 +124,10 @@ impl NpmFetchResolver {
     let maybe_get_nv = || async {
       let name = req.name.clone();
       let package_info = self.package_info(&name).await?;
+      if let Some(dist_tag) = req.version_req.tag() {
+        let version = package_info.dist_tags.get(dist_tag)?.clone();
+        return Some(PackageNv { name, version });
+      }
       // Find the first matching version of the package.
       let mut versions = package_info.versions.keys().collect::<Vec<_>>();
       versions.sort();

tests/specs/add/dist_tag/__test__.jsonc

@@ -0,0 +1,9 @@
+{
+  "tempDir": true,
+  "steps": [
+    {
+      "args": "add npm:ajv@latest",
+      "output": "Add npm:[email protected]\n"
+    }
+  ]
+}

tests/specs/install/future_install_add_dist_tag/__test__.jsonc

@@ -0,0 +1,12 @@
+{
+  "tempDir": true,
+  "steps": [
+    {
+      "envs": {
+        "DENO_FUTURE": "1"
+      },
+      "args": "install npm:ajv@latest",
+      "output": "install.out"
+    }
+  ]
+}

tests/specs/install/future_install_add_dist_tag/install.out

@@ -0,0 +1,15 @@
+Add npm:[email protected]
+[UNORDERED_START]
+Download http://localhost:4260/ajv
+Download http://localhost:4260/fast-deep-equal
+Download http://localhost:4260/json-schema-traverse
+Download http://localhost:4260/require-from-string
+Download http://localhost:4260/uri-js
+Download http://localhost:4260/punycode
+Download http://localhost:4260/ajv/ajv-8.11.0.tgz
+Download http://localhost:4260/fast-deep-equal/fast-deep-equal-3.1.3.tgz
+Download http://localhost:4260/uri-js/uri-js-4.4.1.tgz
+Download http://localhost:4260/json-schema-traverse/json-schema-traverse-1.0.0.tgz
+Download http://localhost:4260/require-from-string/require-from-string-2.0.2.tgz
+Download http://localhost:4260/punycode/punycode-2.1.1.tgz
+[UNORDERED_END]