Update theme to be more like https://cloud.ibm.com/docs

[allmightyspiff]

https://cloud.ibm.com/apidocs/discovery-data or something similar

[allmightyspiff]

Also, maybe some rough auto examples?

[allmightyspiff]

Or maybe like https://pkg.go.dev/golang.org/x/tools/imports

[allmightyspiff]

https://github.com/softlayer/githubio_source/tree/darkTheme