Emacs: logos version 0.2.0

Logos is a small package for Emacs that provides the means for a simple focus mode utilising page breaks or outline headings. I have been using it for a while now in all my videos, including the presentation I prepared for LibrePlanet 2022 (the conference takes place this weekend). Watch the demo of logos.el and refer to the manual for the relevant details. That page also includes links to the GitLab repo and its mirror on GitHub.

Below are the release notes.

Version 0.2.0 on 2022-03-17

All functions or variables referenced herein have documentation strings and are also documented in the manual.

Implemented the user option logos-olivetti which is a buffer-local variable that is read when logos-focus-mode is enabled. This provides the glue code to integrate Logos with olivetti. Olivetti is a package by Paul W. Rankin which centres the contents of the buffer in its window.
Removed the do-it-yourself snippet that was present in the manual for piecing together Logos and Olivetti. The documentation has been updated accordingly. Users who followed the old method are advised to review their configurations.
Abstracted the state handling of the variables and modes that are affected by logos-focus-mode, based on feedback by Daniel Mendler. This improves how the code is written and makes it easier to extend it.
Introduced the user options logos-indicate-buffer-boundaries and logos-buffer-read-only. Both are buffer-local and both take effect when logos-focus-mode is enabled. The former controls the indicate-buffer-boundaries while the latter determines whether the buffer should be put in a read-only mode.
Changed how user options are declared as buffer-local, by using the appropriate keyword of defcustom. Thanks to Philip Kaludercic for the patch, which was sent via email.
Wrote a node entry on how to write a regular expression that targets only specific Org heading levels. This pertains to user options logos-outlines-are-pages and logos-outline-regexp-alist.
Added keywords to the package metadata to help its discoverability.
Fixed typo in a function’s doc string. Thanks to Remco van ‘t Veer for the contribution in merge request 1: https://gitlab.com/protesilaos/logos/-/merge_requests/1.
Fixed typo in the manual. Thanks to user Ypot for the contribution in merge request 2: https://gitlab.com/protesilaos/logos/-/merge_requests/2.
Appended an “Acknowledgements” section in the manual, which references the names of everyone involved in the development of this package.