Update package metadata docs/examples/error_handler (#2914)

Author: ofek

docs/examples/error_handler/error_handler_0/pyproject.toml

@@ -0,0 +1,42 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "error-handler-0"
+dynamic = ["version"]
+description = "This is just an error handler example package"
+readme = "README.rst"
+license = "Apache-2.0"
+requires-python = ">=3.7"
+authors = [
+  { name = "OpenTelemetry Authors", email = "[email protected]" },
+]
+classifiers = [
+  "Development Status :: 4 - Beta",
+  "Intended Audience :: Developers",
+  "License :: OSI Approved :: Apache Software License",
+  "Programming Language :: Python",
+  "Programming Language :: Python :: 3",
+  "Programming Language :: Python :: 3.7",
+  "Programming Language :: Python :: 3.8",
+  "Programming Language :: Python :: 3.9",
+  "Programming Language :: Python :: 3.10",
+]
+dependencies = [
+  "opentelemetry-sdk ~= 1.3",
+]
+
+[project.entry-points.opentelemetry_error_handler]
+error_handler_0 = "error_handler_0:ErrorHandler0"
+
+[tool.hatch.version]
+path = "src/error_handler_0/version.py"
+
+[tool.hatch.build.targets.sdist]
+include = [
+  "/src",
+]
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/opentelemetry"]

docs/examples/error_handler/error_handler_0/setup.cfg

@@ -0,0 +1,42 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "error-handler-1"
+dynamic = ["version"]
+description = "This is just an error handler example package"
+readme = "README.rst"
+license = "Apache-2.0"
+requires-python = ">=3.7"
+authors = [
+  { name = "OpenTelemetry Authors", email = "[email protected]" },
+]
+classifiers = [
+  "Development Status :: 4 - Beta",
+  "Intended Audience :: Developers",
+  "License :: OSI Approved :: Apache Software License",
+  "Programming Language :: Python",
+  "Programming Language :: Python :: 3",
+  "Programming Language :: Python :: 3.7",
+  "Programming Language :: Python :: 3.8",
+  "Programming Language :: Python :: 3.9",
+  "Programming Language :: Python :: 3.10",
+]
+dependencies = [
+  "opentelemetry-sdk ~= 1.3",
+]
+
+[project.entry-points.opentelemetry_error_handler]
+error_handler_1 = "error_handler_1:ErrorHandler1"
+
+[tool.hatch.version]
+path = "src/error_handler_1/version.py"
+
+[tool.hatch.build.targets.sdist]
+include = [
+  "/src",
+]
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/opentelemetry"]