Files
langchain/libs
남광우 7ab82eb8cc langchain: Copy libs/standard-tests folder when building devcontainer (#24470)
### Description

* Fix `libs/langchain/dev.Dockerfile` file. copy the
`libs/standard-tests` folder when building the devcontainer.
* `poetry install --no-interaction --no-ansi --with dev,test,docs`
command requires this folder, but it was not copied.

### Reference

#### Error message when building the devcontainer from the master branch

```
...

[2024-07-20T14:27:34.779Z] ------
 > [langchain langchain-dev-dependencies 7/7] RUN poetry install --no-interaction --no-ansi --with dev,test,docs:
0.409 
0.409 Directory ../standard-tests does not exist
------

...
```

#### After the fix

Build success at vscode:

<img width="866" alt="image"
src="https://github.com/user-attachments/assets/10db1b50-6fcf-4dfe-83e1-d93c96aa2317">
2024-07-22 13:46:38 +00:00
..
2024-07-03 18:33:15 +00:00
2024-07-20 00:43:29 +00:00