Add example for each section of `pyproject.toml` (#5585)

Co-authored-by: Bjorn Neergaard <bjorn@neersighted.com>

docs/pyproject.md

@@ -17,12 +17,20 @@ The `tool.poetry` section of the `pyproject.toml` file is composed of multiple s
 
 The name of the package. **Required**
 
+```toml
+name = "my-package"
+```
+
 ## version
 
 The version of the package. **Required**
 
 This should be a valid [PEP 440](https://peps.python.org/pep-0440/) string.
 
+```toml
+version = "0.1.0"
+```
+
 {{% note %}}
 
 If you would like to use semantic versioning for your project, please see
@@ -34,6 +42,10 @@ If you would like to use semantic versioning for your project, please see
 
 A short description of the package. **Required**
 
+```toml
+description = "A short description of the package."
+```
+
 ## license
 
 The license of the package.
@@ -61,40 +73,76 @@ More identifiers are listed at the [SPDX Open Source License Registry](https://s
 If your project is proprietary and does not use a specific licence, you can set this value as `Proprietary`.
 {{% /note %}}
 
+```toml
+license = "MIT"
+```
+
 ## authors
 
 The authors of the package. **Required**
 
 This is a list of authors and should contain at least one author. Authors must be in the form `name <email>`.
 
+```toml
+authors = [
+    "Sébastien Eustace <sebastien@eustace.io>",
+]
+```
+
 ## maintainers
 
 The maintainers of the package. **Optional**
 
 This is a list of maintainers and should be distinct from authors. Maintainers may contain an email and be in the form `name <email>`.
 
+```toml
+maintainers = [
+    "Richard Brave <email@example.org>",
+]
+```
+
 ## readme
 
 The readme file of the package. **Optional**
 
 The file can be either `README.rst` or `README.md`.
 
+```toml
+readme = "README.md" # or "README.rst"
+```
+
 ## homepage
 
 An URL to the website of the project. **Optional**
 
+```toml
+homepage = "https://python-poetry.org/"
+```
+
 ## repository
 
 An URL to the repository of the project. **Optional**
 
+```toml
+repository = "https://github.com/python-poetry/poetry"
+```
+
 ## documentation
 
 An URL to the documentation of the project. **Optional**
 
+```toml
+documentation = "https://python-poetry.org/docs/"
+```
+
 ## keywords
 
 A list of keywords that the package is related to. **Optional**
 
+```toml
+keywords = ["packaging", "poetry"]
+```
+
 ## classifiers
 
 A list of PyPI [trove classifiers](https://pypi.org/classifiers/) that describe the project. **Optional**