Replace signature nodes with sections
Replace signature nodes with sections

This is an attempt to provide a setup that does not indent the contents
of the 'Public Functions' parts of the documents. Using a
desc_signature node for that part leads to the contents being indented
which isn't necessary and adds to the already significant amount of
indentation that we have.

Here we replace the signature and contents with an official 'section'
node which doesn't do any indentation.

AnthonyTruchet/breathe,kirbyfan64/breathe,AnthonyTruchet/breathe,AnthonyTruchet/breathe,kirbyfan64/breathe,kirbyfan64/breathe,RR2DO2/breathe,AnthonyTruchet/breathe,RR2DO2/breathe,kirbyfan64/breathe