Move docs/metadata to pyinfra.api.metadata need to

fix docs generation error for missing jinja2 vars

Author: rod7760

docs/conf.py

@@ -1,15 +1,11 @@
-import os
-import sys
 from datetime import date
 from os import environ, mkdir, path
 from shutil import rmtree
 
 import guzzle_sphinx_theme
 
 from pyinfra import __version__, local
-
-sys.path.insert(0, os.path.abspath(os.path.dirname(__file__)))
-import metadata  # noqa # this is a local module
+from pyinfra.api import metadata
 
 copyright = "Nick Barrett {0} — pyinfra v{1}".format(
     date.today().year,

docs/metadata.py renamed to src/pyinfra/api/metadata.py

@@ -1,7 +1,7 @@
 """
 Support parsing pyinfra-metadata.toml
 
-Currently just parses plugins their metadata.
+Currently just parses plugins and their metadata.
 """
 
 import tomllib