docs: split PyPI docs up and add more (bazel-contrib#2935)

Summary:
- Split the PyPI docs per topic.
- Move everything to its own folder.
- Separate the `bzlmod` and `WORKSPACE` documentation. Some of the
  features are only available in `bzlmod` and since `bzlmod` is the
  future having that as the default makes things a little easier.
- Fix a few warnings.

Fixes bazel-contrib#2810.

Author: aignas

CONTRIBUTING.md

@@ -68,7 +68,7 @@ to the actual rules_python project and begin the code review process.
 ## Developer guide
 
 For more more details, guidance, and tips for working with the code base,
-see [DEVELOPING.md](DEVELOPING.md)
+see [docs/devguide.md](./devguide)
 
 ## Formatting
 

MODULE.bazel

@@ -134,6 +134,7 @@ dev_pip.parse(
     download_only = True,
     experimental_index_url = "https://pypi.org/simple",
     hub_name = "dev_pip",
+    parallel_download = False,
     python_version = "3.11",
     requirements_lock = "//docs:requirements.txt",
 )

docs/BUILD.bazel

@@ -120,7 +120,10 @@ sphinx_stardocs(
         "//python/private:rule_builders_bzl",
         "//python/private/api:py_common_api_bzl",
         "//python/private/pypi:config_settings_bzl",
+        "//python/private/pypi:env_marker_info_bzl",
         "//python/private/pypi:pkg_aliases_bzl",
+        "//python/private/pypi:whl_config_setting_bzl",
+        "//python/private/pypi:whl_library_bzl",
         "//python/uv:lock_bzl",
         "//python/uv:uv_bzl",
         "//python/uv:uv_toolchain_bzl",

docs/conf.py

@@ -91,6 +91,8 @@
     "api/sphinxdocs/private/sphinx_docs_library": "/api/sphinxdocs/sphinxdocs/private/sphinx_docs_library.html",
     "api/sphinxdocs/sphinx_docs_library": "/api/sphinxdocs/sphinxdocs/sphinx_docs_library.html",
     "api/sphinxdocs/inventories/index": "/api/sphinxdocs/sphinxdocs/inventories/index.html",
+    "pip.html": "pypi/index.html",
+    "pypi-dependencies.html": "pypi/index.html",
 }
 
 # Adapted from the template code:
@@ -139,7 +141,9 @@
 
 # --- Extlinks configuration
 extlinks = {
+    "gh-issue": (f"https://github.com/bazel-contrib/rules_python/issues/%s", "#%s issue"),
     "gh-path": (f"https://github.com/bazel-contrib/rules_python/tree/main/%s", "%s"),
+    "gh-pr": (f"https://github.com/bazel-contrib/rules_python/pulls/%s", "#%s PR"),
 }
 
 # --- MyST configuration

docs/getting-started.md

@@ -8,13 +8,13 @@ It assumes you have a `requirements.txt` file with your PyPI dependencies.
 
 For more details information about configuring `rules_python`, see:
 * [Configuring the runtime](configuring-toolchains)
-* [Configuring third party dependencies (pip/pypi)](pypi-dependencies)
+* [Configuring third party dependencies (pip/pypi)](./pypi/index)
 * [API docs](api/index)
 
-## Using bzlmod
+## Including dependencies
 
-The first step to using rules_python with bzlmod is to add the dependency to
-your MODULE.bazel file:
+The first step to using `rules_python` is to add the dependency to
+your `MODULE.bazel` file:
 
 ```starlark
 # Update the version "0.0.0" to the release found here:
@@ -30,7 +30,7 @@ pip.parse(
 use_repo(pip, "pypi")
 ```
 
-## Using a WORKSPACE file
+### Using a WORKSPACE file
 
 Using WORKSPACE is deprecated, but still supported, and a bit more involved than
 using Bzlmod. Here is a simplified setup to download the prebuilt runtimes.

docs/index.md

@@ -95,9 +95,8 @@ See {gh-path}`Bzlmod support <BZLMOD_SUPPORT.md>` for any behaviour differences
 :hidden:
 self
 getting-started
-pypi-dependencies
+pypi/index
 Toolchains <toolchains>
-pip
 coverage
 precompiling
 gazelle