[elpa] externals/lin 466a4e8689 1/2: Add README.md as it previews better on Git forges

[ELPA Syncer]

branch: externals/lin
commit 466a4e8689ebd61dc8296b0d0f72082b7fc049d5
Author: Protesilaos Stavrou <info@protesilaos.com>
Commit: Protesilaos Stavrou <info@protesilaos.com>

    Add README.md as it previews better on Git forges
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+# Lin
+
+Lin is a stylistic enhancement for Emacs' built-in `hl-line-mode`.  It
+remaps the `hl-line` face (or equivalent) buffer-locally to a style that
+is optimal for major modes where line selection is the primary mode of
+interaction.
+
+The idea is that `hl-line-mode` cannot work equally well for contexts
+with competing priorities: (i) line selection, or (ii) simple line
+highlight.  In the former case, the current line needs to be made
+prominent because it carries a specific meaning of some significance in
+the given context: the user has to select a line.  Whereas in the latter
+case, the primary mode of interaction does not revolve around the line
+highlight itself: it may be because the focus is on editing text or
+reading through the buffer's contents, so the current line highlight is
+more of a reminder of the point's location on the vertical axis.
+
++ Package name (GNU ELPA): `lin`
++ Official manual: <https://protesilaos.com/emacs/lin>
++ Change log: <https://protesilaos.com/emacs/lin-changelog>
++ Git repositories:
+  + GitHub: <https://github.com/protesilaos/lin>
+  + GitLab: <https://gitlab.com/protesilaos/lin>
++ Backronym: LIN Is Noticeable.