Generate opam .install file.

[rgrinberg]

omake would be more opam friendly if it could generate an "install" file for opam to do the actual installation. The .install file should describe all the artifacts (binaries, libraries, documentation) that omake would like to install. Here's an example (taken from the 0install package):

bin: [
  "dist/files/0install"
  "dist/files/0install" {"0launch"}
  "dist/files/0install" {"0store"}
  "dist/files/0install" {"0store-secure-add"}
  "dist/files/0install" {"0desktop"}
  "dist/files/0install" {"0alias"}
]
lib: [
  "?dist/files/gui_gtk.cmxs"
  "?dist/files/gui_gtk.cma"
]
man: [
  "0launch.1" {"man1/0launch.1"}
  "0store-secure-add.1" {"man1/0store-secure-add.1"}
  "0store.1" {"man1/0store.1"}
  "0desktop.1" {"man1/0desktop.1"}
  "0install.1" {"man1/0install.1"}
]

(The ? prefix means that the artifact is optional)

https://opam.ocaml.org/doc/manual/dev-manual.html

Section 2.2.3 for the full doc of the format.

@gerdstolpmann if you don't have time for this, I'd be happy to work on this myself given a few pointers.