get rid of LyceumExamples tomls

[colinxs]

currently there's there's

Project.toml
Manifest.toml

and

docs/assets/LyceumExamples/Project.toml

The former is supposed to specify build dependencies while the latter is supposed to specify dependencies needed to run the examples. This means that example dependencies have to added in two different places. Instead, place all dependencies needed to run the examples in the root and documention-specific deps (i.e. Literate and Documenter) in:

docs/Project.toml
docs/Manifest.toml

[colinxs]

post-release