make following fixes for deploy cli:
- allow logs command to read in `_DEPLOYMENT_NAME_ENV`
- change prompt for api key to be more user friendly
- refactor prompt for org scoped keys
- make sure --config option is documented in deploy help
### Summary
This PR introduces a subcommand implementation that allows `langgraph
deploy list` and `langgraph deploy delete` subcommands.
#### `langgraph deploy list`
```bash
(env) andrewnguonly@Andrew-Nguonly-KC23X90J02 langgraph % langgraph deploy list --help ⎈ gke_langchain-test-387119_us-west1_langgraph-cloud-us-west1
Usage: langgraph deploy list [OPTIONS]
[Beta] List LangSmith Deployments.
Options:
--name-contains TEXT Only show deployments whose names contain this value.
--api-key TEXT API key. Can also be set via LANGGRAPH_HOST_API_KEY,
LANGSMITH_API_KEY, or LANGCHAIN_API_KEY environment
variable or .env file.
--help Show this message and exit.
```
Output example:
```bash
(env) andrewnguonly@Andrew-Nguonly-KC23X90J02 cli % langgraph deploy list
Deployment ID Deployment Name Deployment URL
------------------------------------ -------------------------- ------------------------------------------------------------------------------------
a40d6567-87c0-485a-a23d-94309a7d4519 ht-andrew-test-04 -
9da26acb-d0c9-4af0-af9e-f3fe8dfe85bc ht-anirudh-deployment-test https://ht-anirudh-deployment-test-428af4737f8a533cb2b107587eb8f38f.us.langgraph.app/
```
#### `langgraph deploy delete`
```bash
(env) andrewnguonly@Andrew-Nguonly-KC23X90J02 langgraph % langgraph deploy delete --help ⎈ gke_langchain-test-387119_us-west1_langgraph-cloud-us-west1
Usage: langgraph deploy delete [OPTIONS] DEPLOYMENT_ID
[Beta] Delete a LangSmith Deployment.
Options:
--force Delete without prompting for confirmation.
--api-key TEXT API key. Can also be set via LANGGRAPH_HOST_API_KEY,
LANGSMITH_API_KEY, or LANGCHAIN_API_KEY environment variable
or .env file.
--help Show this message and exit.
```
Output example:
```bash
(env) andrewnguonly@Andrew-Nguonly-KC23X90J02 cli % langgraph deploy delete a40d6567-87c0-485a-a23d-94309a7d4519
Are you sure you want to delete deployment ID a40d6567-87c0-485a-a23d-94309a7d4519? (Y/n): Y
Host API key:
Deleted deployment a40d6567-87c0-485a-a23d-94309a7d4519.
```
```bash
(env) andrewnguonly@Andrew-Nguonly-KC23X90J02 cli % langgraph deploy delete a40d6567-87c0-485a-a23d-94309a7d4519
Are you sure you want to delete deployment ID a40d6567-87c0-485a-a23d-94309a7d4519? (Y/n): n
Aborted!
```
```bash
(env) andrewnguonly@Andrew-Nguonly-KC23X90J02 cli % langgraph deploy delete 9da26acb-d0c9-4af0-af9e-f3fe8dfe85bc --force
Host API key:
Deleted deployment 9da26acb-d0c9-4af0-af9e-f3fe8dfe85bc.
```
Allow users to deploy to langsmith deployments from the langgraph-cli.
This PR makes the following changes:
1. Add a simple host backend client with httpx
2. Adjust `progress.py` to show elapsed time for commands, and also use
threading.Event to stop the spinner
3. Adjust `_build` to allow arbitrary command so we can pass `docker
buildx build` and default to `docker build`
4. Add new `deploy` command, this re-uses a lot of the `langgraph build`
functionality, and then uses the new host-backend client to push the
built image to langsmith deployments.
---------
Co-authored-by: David Asamu <david.asamu@langchain.dev>
