feat(node_compat): Added base implementation of FileHandle (#19294)

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## WHY

ref: https://github.com/denoland/deno/issues/19165

Node's fs/promises includes a FileHandle class, but deno does not. The
open function in Node's fs/promises returns a FileHandle, which provides
an IO interface to the file. However, deno's open function returns a
resource id.


### deno 

```js
> const fs = await import("node:fs/promises");
undefined
> const file3 = await fs.open("./README.md");
undefined
> file3
3
> file3.read
undefined
Node:
```

### Node
```js
> const fs = await import("fs/promises");
undefined
>   const file3 = await fs.open("./tests/e2e_unit/testdata/file.txt");
undefined
> file3
FileHandle {
  _events: [Object: null prototype] {},
  _eventsCount: 0,
  _maxListeners: undefined,
  close: [Function: close],
  [Symbol(kCapture)]: false,
  [Symbol(kHandle)]: FileHandle {},
  [Symbol(kFd)]: 24,
  [Symbol(kRefs)]: 1,
  [Symbol(kClosePromise)]: null
}
> file3.read
[Function: read]
```


To be compatible with Node, deno's open function should also return a
FileHandle.

## WHAT

I have implemented the first step in adding a FileHandle.

- Changed the return value of the open function to a FileHandle object
- Implemented the readFile method in FileHandle
- Add test code


## What to do next
This PR is the first step in adding a FileHandle, and there are things
that should be done next.

- Add functionality equivalent to Node's FileHandle to FileHandle
(currently there is only readFile)

---------

Co-authored-by: Matt Mastracci <matthew@mastracci.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/cli/tests/integration/node_unit_tests.rs b/cli/tests/integration/node_unit_tests.rs
index 1cd52f61d..f62c8761c 100644
--- a/cli/tests/integration/node_unit_tests.rs
+++ b/cli/tests/integration/node_unit_tests.rs
@@ -25,6 +25,7 @@ util::unit_test_factory!(
     _fs_fsync_test = _fs / _fs_fsync_test,
     _fs_ftruncate_test = _fs / _fs_ftruncate_test,
     _fs_futimes_test = _fs / _fs_futimes_test,
+    _fs_handle_test = _fs / _fs_handle_test,
     _fs_link_test = _fs / _fs_link_test,
     _fs_lstat_test = _fs / _fs_lstat_test,
     _fs_mkdir_test = _fs / _fs_mkdir_test,