Cleanup npm script names

[ptrgags]

Looking through the scripts in package.json, a lot of the tasks have inconsistent naming or have misleading names

To point out a few issues:

• some tasks use kebab-case (e.g. prettier-check) while others use camelCase (e.g. buildApps). We should pick a consistent style. (Personally I find kebab-case easier to type on the command line)
• generateDocumentation seems needlessly long, maybe build-docs?
• release makes me think ":warning: this is a command to publish the code to some server, use with care! :warning:" when the task just builds the release version of Cesium locally. Perhaps build-release?