refactor: deno_runtime crate (#8640)

This commit moves Deno JS runtime, ops, permissions and
inspector implementation to new "deno_runtime" crate located
in "runtime/" directory.

Details in "runtime/README.md".

Co-authored-by: Ryan Dahl <ry@tinyclouds.org>

runtime/js.rs

@@ -0,0 +1,31 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+
+use deno_core::Snapshot;
+
+pub static CLI_SNAPSHOT: &[u8] =
+  include_bytes!(concat!(env!("OUT_DIR"), "/CLI_SNAPSHOT.bin"));
+
+pub fn deno_isolate_init() -> Snapshot {
+  debug!("Deno isolate init with snapshots.");
+  let data = CLI_SNAPSHOT;
+  Snapshot::Static(data)
+}
+
+#[test]
+fn cli_snapshot() {
+  let mut js_runtime = deno_core::JsRuntime::new(deno_core::RuntimeOptions {
+    startup_snapshot: Some(deno_isolate_init()),
+    ..Default::default()
+  });
+  js_runtime
+    .execute(
+      "<anon>",
+      r#"
+      if (!(bootstrap.mainRuntime && bootstrap.workerRuntime)) {
+        throw Error("bad");
+      }
+      console.log("we have console.log!!!");
+    "#,
+    )
+    .unwrap();
+}