feat: auto-discover package.json for npm dependencies (#17272)

This commits adds auto-discovery of "package.json" file when running
"deno run" and "deno task" subcommands. In case of "deno run" the
"package.json" is being looked up starting from the directory of the
script that is being run, stopping early if "deno.json(c)" file is found
(ie. FS tree won't be traversed "up" from "deno.json").

When "package.json" is discovered the "--node-modules-dir" flag is
implied, leading to creation of local "node_modules/" directory - we
did that, because most tools relying on "package.json" will expect
"node_modules/" directory to be present (eg. Vite). Additionally 
"dependencies" and "devDependencies" specified in the "package.json"
are downloaded on startup. 

This is a stepping stone to supporting bare specifier imports, but
the actual integration will be done in a follow up commit.

---------

Co-authored-by: David Sherret <dsherret@gmail.com>

4 files changed, 23 insertions, 0 deletions

diff --git a/cli/tests/testdata/run/with_package_json/with_stop/main.out b/cli/tests/testdata/run/with_package_json/with_stop/main.out
new file mode 100644
index 000000000..e7ef053e4
--- /dev/null
+++ b/cli/tests/testdata/run/with_package_json/with_stop/main.out
@@ -0,0 +1,4 @@
+[WILDCARD]Config file found at '[WILDCARD]with_package_json[WILDCARD]with_stop[WILDCARD]some[WILDCARD]nested[WILDCARD]deno.json'
+[WILDCARD]No package.json file found
+[WILDCARD]
+ok
diff --git a/cli/tests/testdata/run/with_package_json/with_stop/package.json b/cli/tests/testdata/run/with_package_json/with_stop/package.json
new file mode 100644
index 000000000..9ee3f39a8
--- /dev/null
+++ b/cli/tests/testdata/run/with_package_json/with_stop/package.json
@@ -0,0 +1,8 @@
+{
+  "dependencies": {
+    "@denotest/check-error": "1.0.0"
+  },
+  "devDependencies": {
+    "@denotest/cjs-default-export": "1.0.0"
+  }
+}
diff --git a/cli/tests/testdata/run/with_package_json/with_stop/some/nested/deno.json b/cli/tests/testdata/run/with_package_json/with_stop/some/nested/deno.json
new file mode 100644
index 000000000..36e1765d1
--- /dev/null
+++ b/cli/tests/testdata/run/with_package_json/with_stop/some/nested/deno.json
@@ -0,0 +1,5 @@
+{
+  "tasks": {
+    "dev": "deno run main.ts"
+  }
+}
diff --git a/cli/tests/testdata/run/with_package_json/with_stop/some/nested/dir/main.ts b/cli/tests/testdata/run/with_package_json/with_stop/some/nested/dir/main.ts
new file mode 100644
index 000000000..daefa8f60
--- /dev/null
+++ b/cli/tests/testdata/run/with_package_json/with_stop/some/nested/dir/main.ts
@@ -0,0 +1,6 @@
+// TODO(bartlomieju): currently we don't support actual bare specifier
+// imports; this will be done in a follow up PR.
+// import express from "express";
+
+// console.log(express);
+console.log("ok");