mode-minder: list all your major and minor modes

[mode-minder](https://github.com/jdtsmith/mode-minder) I kept looking for a list of major-mode hierarchies, so I could decide, for example, which hooks to tie into (`prog-mode`, I'm looking at you). I couldn't find such a list, so decided to write a little tool that builds the hierarchy of major modes, and threw in standalone and minor modes too, along with help links, a docstring, and a flag indicating the origin of the package. More than 700 modes here, with some interesting finds. `special-mode`? Who knew?

looks very useful. thanks for sharing.

Thanks so much for this!

This is very nice. Thank you!

Just info: For the UI, you could use `hierarchy.el` which is now built into Emacs. Looks useful anyway, good work.

Is there a similar package for showing the hierarchy/inheritance of keymaps?

This is very useful to better understand the connection between all the TeX and LaTeX modes that come with Emacs, together with the ones provided by AUCTeX.

Indeed, quite useful. Thanks!

Wow, maybe this one should be upstreamed?

Thanks. Interestingly, this revealed that some builtins do not register autoloads for their modes; `hierarchy.el` is among them. I haven't found a good way to identify installed libraries on the load-path which provide major/minor modes, but which do *not* include autoloads for them. Searching for *all library files* and loading them is way too heavy, crashing Emacs.

Indeed, to discover all installed major modes, you will have to load all installed libraries (or statically analyze code?), which is impractical. Some major modes are too trivial, so use of `mapatoms` would be usually sufficient. If you want to build a comprehensive database of major modes, I would suggest collaborating with [EmacsMirror](https://github.com/emacsmirror/epkgs)!

Updated to list *aliases* to modes in parentheses and tweak the styling.