* pkgs/applications/editors/emacs/site-start.el (tramp-sh): Use
correct feature name
Tramp upstream recently dropped the autoload cookie from
tramp-remote-path. This makes Emacs error when trying to load tramp.
Using the correct feature name fixes this.
This adds subdirectories of `share/emacs/site-lisp/` in every path in
`NIX_PROFILES` to `load-path` to allow loading of more complex
libraries like `mu4e`.
Fixes#33412
`site-start.el` is the file loaded on startup, containing nix-specific
customizations like adding paths in `NIX_PROFILES` to the
emacs-specific search-path (`load-path`) or making man-pages in these
directories discoverable.
This commit removes all references to emacs24 with the exception of
emacs24-macports. The two folders in `pkgs/applications/editors` named
`emacs-24` and `emacs-24` are consolidated to a new `emacs` folder.
Various parts in nixpkgs also referenced `emacs24Packages` (pinned to
`emacs24`) explicitly where `emacsPackages` (non-pinned) is more
appropriate. These references get fixed by this commit too.
