pybricks: move into src/ directory

Moving the pybricks package into a src/ directory so that we can add
additional packages without polluting the top-level directory.

doc/common/conf.py

@@ -31,7 +31,7 @@ from sphinx.domains.python import PyClassmember, PythonDomain
 import toml
 
 TOP_DIR = os.path.abspath(os.path.join('..', '..'))
-sys.path.insert(0, TOP_DIR)
+sys.path.insert(0, os.path.join(TOP_DIR, 'src'))
 sys.path.append(os.path.abspath('../common/extensions'))
 
 from pybricks.hubs import EV3Brick  # noqa E402

pyproject.toml

@@ -13,7 +13,9 @@ classifiers = [
     "Development Status :: 3 - Alpha",
     "Programming Language :: Python :: Implementation :: MicroPython",
 ]
-include = ["pybricks/py.typed"]
+packages = [
+    { include = "pybricks", from = "src" },
+]
 
 [tool.poetry.dependencies]
 python = "^3.8"