v1.4.0
doc: Update arbitration team to be flashrom specific
doc: Add doc how to support flashrom project
doc: Make OS specific instructions as headers so they are linkable
doc: Add favicon to config to display in the browser tab
doc: Release notes for version 1.4.0
doc: Add doc for supported boards and laptops
doc: Convert ME and Intel docs
doc: Link useful section of manpage into Supported programmers index
doc: Add documentation license
doc: Clarify that adding docs follows dev process and add into howtos
doc: Convert serprog docs to rst and add to doc directory
doc: Add current numbers of supported devices to the intro page
Makefile,meson.build: Add support for Sphinx versions prior to 4.x