Automated documentation update (#227)

Automated documentation update

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

src/r-dependent-packages/README.md

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+
+# R packages from the DESCRIPTION file (via pak) (r-dependent-packages)
+
+This Feature sets scripts to install dependent R packages from the DESCRIPTION file in the repository.
+
+## Example Usage
+
+```json
+"features": {
+    "ghcr.io/rocker-org/devcontainer-features/r-dependent-packages:0": {}
+}
+```
+
+## Options
+
+| Options Id | Description | Type | Default Value |
+|-----|-----|-----|-----|
+| when | When to install the dependent R packages? Each option corresponds to the lifecycle scripts. | string | postCreate |
+| pakVersion | Version of pak to install. By default, the stable version is installed if needed. | string | auto |
+| manifestRoot | The root path of the DESCRIPTION file recording the dependent R packages. Passed to the `root` argument of the `pak::local_install_deps()` function. | string | . |
+| additionalRepositories | String passed to the `pak::repo_add()` function. | string | - |
+| dependencyTypes | Comma separated list of dependency types to install. Passed to the `dependencies` argument of the `pak::local_install_deps()` function. | string | all |
+
+<!-- markdownlint-disable MD041 -->
+
+## System Requirements
+
+Please use this with an R-installed image (e.g. [`ghcr.io/rocker-org/devcontainer/r-ver`](https://rocker-project.org/images/devcontainer/images.html))
+or this should be installed after installing Features that installs R
+(e.g. [`ghcr.io/rocker-org/devcontainer-features/r-apt`](https://github.com/rocker-org/devcontainer-features/tree/main/src/r-apt),
+[`ghcr.io/rocker-org/devcontainer-features/r-rig`](https://github.com/rocker-org/devcontainer-features/tree/main/src/r-rig)).
+
+```json
+"features": {
+    "ghcr.io/rocker-org/devcontainer-features/r-rig:1": {},
+    "ghcr.io/rocker-org/devcontainer-features/r-dependent-packages:latest": {}
+}
+```
+
+## DESCRIPTION file format
+
+This feature installs packages listed in the manifest file named `DESCRIPTION`.
+If you are new to the `DESCRIPTION` file, please refer to the
+[`usethis::use_description()`](https://usethis.r-lib.org/reference/use_description.html) function's reference.
+
+Here is an minimal example of the `DESCRIPTION` file.
+At least, the `Package` and `Version` fields are required.
+The `Imports` field is a list of packages that will be installed.
+
+```dcf
+Package: foo
+Version: 0.0.0.9000
+Imports:
+    cli,
+    rlang
+```
+
+### Additional fields
+
+When developing an R package, we may want to specify dependencies that are only needed during development
+in the `DESCRIPTION` file. In such cases, we can use any field name starting with `Config`,
+and generally specify multiple fields prefixed with `Config/Needs` as follows:
+
+```dcf
+Package: foo
+Version: 0.0.0.9000
+Suggests:
+    cli
+Config/Needs/website:
+    curl
+Config/Needs/dev:
+    crayon
+```
+
+If we want use such fields to install dependencies, we can specify the `dependencyTypes` field of
+this Feature like this:
+
+```json
+"ghcr.io/rocker-org/devcontainer-features/r-dependent-packages:latest": {
+    "dependencyTypes": "all,Config/Needs/website,Config/Needs/dev"
+}
+```
+
+## Environment variables
+
+Enviroment variables listed in [the `containerEnv` field](https://containers.dev/implementors/json_reference/#general-properties)
+are used in the package installation process.
+See [the reference of the `pak` package](https://pak.r-lib.org/reference/pak-config.html) for options for `pak`.
+
+```json
+"containerEnv": {
+    "NOT_CRAN": "true",
+    "PKG_CRAN_MIRROR": "https://cloud.r-project.org/"
+}
+```
+
+## Cache directory and cache volume
+
+The package cache directory in the container is set to `/pak/cache`.
+
+This directory is stored in a volume named `devcontainer-pak-cache`
+and is shared among multiple containers.
+
+## References
+
+- [pak](https://pak.r-lib.org/)
+
+
+---
+
+_Note: This file was auto-generated from the [devcontainer-feature.json](https://github.com/rocker-org/devcontainer-features/blob/main/src/r-dependent-packages/devcontainer-feature.json).  Add additional notes to a `NOTES.md`._