Improve set-up instructions for examples (#534)

* Add pip install line for processes example set up instructions

* Add lithops-aws and lithops-gcp extras

Author: tomwhite

examples/README.md

@@ -23,7 +23,7 @@ Follow the instructions for setting up Cubed to run on your executor runtime:
 
 | Executor  | Cloud  | Set up instructions                            |
 |-----------|--------|------------------------------------------------|
-| Processes | N/A    | N/A                                            |
+| Processes | N/A    | `pip install 'cubed[diagnostics]'`             |
 | Lithops   | AWS    | [lithops/aws/README.md](lithops/aws/README.md) |
 |           | Google | [lithops/gcp/README.md](lithops/gcp/README.md) |
 | Modal     | AWS    | [modal/aws/README.md](modal/aws/README.md)     |

examples/lithops/aws/README.md

@@ -12,7 +12,7 @@
 ```shell
 conda create --name cubed-lithops-aws-examples -y python=3.11
 conda activate cubed-lithops-aws-examples
-pip install -r requirements.txt  # use requirements file from same directory as this readme
+pip install 'cubed[lithops-aws]'
 ```
 
 2. Configure Lithops with an [AWS Lambda compute backend](https://lithops-cloud.github.io/docs/source/compute_config/aws_lambda.html), and an [AWS S3 storage backend](https://lithops-cloud.github.io/docs/source/storage_config/aws_s3.html).

examples/lithops/gcp/README.md

@@ -12,7 +12,7 @@
 # from this directory
 conda create --name cubed-lithops-gcp-examples -y python=3.11
 conda activate cubed-lithops-gcp-examples
-pip install -r requirements.txt  # use requirements file from same directory as this readme
+pip install 'cubed[lithops-gcp]'
 ```
 
 2. Configure Lithops with a [Google Cloud Functions compute backend](https://lithops-cloud.github.io/docs/source/compute_config/gcp_functions.html#configuration), and a [Google Cloud Storage backend](https://lithops-cloud.github.io/docs/source/storage_config/gcp_storage.html#configuration).

pyproject.toml

@@ -54,6 +54,16 @@ beam = ["apache-beam", "gcsfs"]
 dask = ["dask"]
 dask-distributed = ["distributed"]
 lithops = ["lithops[aws] >= 2.7.0"]
+lithops-aws = [
+    "cubed[diagnostics]",
+    "lithops[aws]",
+    "s3fs",
+]
+lithops-gcp = [
+    "cubed[diagnostics]",
+    "lithops[gcp]",
+    "gcsfs",
+]
 modal = [
     "cubed[diagnostics]",
     "modal-client",