Housekeeping (#8)

* Rename the provider to dockerbuild.
* Add Makefile targets required by CI.
* Add per-language test targets compatible with CI.
* Fix broken example yaml.
* Add gitignore exclusions to fix SDK generation in CI.
* Fix lint errors.
* Vendor pulumi CLI via `tools.go` instead of `.pulumi`.
* Consolidate `go.mod`s into one file, with a minimal `go.mod` for the
Go SDK.
* Add codecov.

sdk/python/pyproject.toml

@@ -0,0 +1,20 @@
+[project]
+  name = "pulumi_dockerbuild"
+  description = "Description"
+  dependencies = ["parver>=0.2.1", "pulumi>=3.0.0,<4.0.0", "semver>=2.8.1"]
+  keywords = ["keywords"]
+  readme = "README.md"
+  requires-python = ">=3.8"
+  version = "0.0.0"
+  [project.urls]
+    Homepage = "pulumi.com"
+    Repository = "https://github.com/pulumi/pulumi-dockerbuild"
+
+[build-system]
+  requires = ["setuptools>=61.0"]
+  build-backend = "setuptools.build_meta"
+
+[tool]
+  [tool.setuptools]
+    [tool.setuptools.package-data]
+      pulumi_dockerbuild = ["py.typed", "pulumi-plugin.json"]