Add a minimal README for themes - will be shown on PyPI (#32)

Author: oprypin

packages/properdocs-theme-mkdocs/README.md

@@ -0,0 +1,9 @@
+# properdocs-theme-mkdocs
+
+This package needs to be installed in order to use the "MkDocs" theme with the [ProperDocs](https://properdocs.org/) documentation generator:
+
+    pip install properdocs-theme-mkdocs
+
+(See <https://properdocs.org/dev-guide/themes/>)
+
+It originates as the "MkDocs" theme made for the [MkDocs](https://www.mkdocs.org/) documentation generator.

packages/properdocs-theme-mkdocs/pyproject.toml

@@ -5,6 +5,7 @@ build-backend = "hatchling.build"
 [project]
 name = "properdocs-theme-mkdocs"
 description = "'mkdocs' theme for ProperDocs, originally made for MkDocs"
+readme = "README.md"
 license = "BSD-2-Clause"
 authors = [
     {name = "Tom Christie", email = "tom@tomchristie.com"},

packages/properdocs-theme-readthedocs/README.md

@@ -0,0 +1,11 @@
+# properdocs-theme-readthedocs
+
+This package needs to be installed in order to use the "ReadTheDocs" theme with the [ProperDocs](https://properdocs.org/) documentation generator:
+
+    pip install properdocs-theme-readthedocs
+
+(See <https://properdocs.org/dev-guide/themes/>)
+
+It is copied from the "ReadTheDocs" theme made for the [MkDocs](https://www.mkdocs.org/) documentation generator.
+
+Its origin is from the "ReadTheDocs" theme for Sphinx: <https://github.com/readthedocs/sphinx_rtd_theme>

packages/properdocs-theme-readthedocs/pyproject.toml

@@ -5,6 +5,7 @@ build-backend = "hatchling.build"
 [project]
 name = "properdocs-theme-readthedocs"
 description = "'readthedocs' theme for ProperDocs, originally made for MkDocs"
+readme = "README.md"
 license = "BSD-2-Clause"
 authors = [
     {name = "Tom Christie", email = "tom@tomchristie.com"},