docs: reorg Getting Started (English)

This commit makes the HTML and PDF versions of the Getting Started
docs have the same contents, built from the same asciidoc source file.
There are still small wrapper files because the PDF and HTML want slightly
different headers & footers, but the actual contents are unified.

It moves all the Getting Started sub-docs into a single directory.

It removes the per-section html files linked from the main index.html
page and replaces them with a single Getting Started document (which
contains all the sections).

Signed-off-by: Sebastian Kuzminsky <seb@highlab.com>
docs: reorg Getting Started (French)

Signed-off-by: Sebastian Kuzminsky <seb@highlab.com>
docs: reorg Getting Started (Spanish)

Signed-off-by: Sebastian Kuzminsky <seb@highlab.com>
docs: split "About LinuxCNC" out from the "Getting LinuxCNC" document

For English, French, & Spanish...

Signed-off-by: Sebastian Kuzminsky <seb@highlab.com>
docs: rename & move the "Running LinuxCNC" section

This does the English and Spanish, which have matching structure.
The French has diverged and will be handled in the next commit.

Signed-off-by: Sebastian Kuzminsky <seb@highlab.com>
docs: reorg french docs to match english

This splits the French "Running LinuxCNC" documentation out from the
"Getting LinuxCNC" document.

At least I think that's what it does, it's been like 25 years since i
studied french...

Signed-off-by: Sebastian Kuzminsky <seb@highlab.com>
docs: rebrand the "Running LinuxCNC" document

I guess no users have relied on this document to learn how to start
linuxcnc...

Signed-off-by: Sebastian Kuzminsky <seb@highlab.com>
docs: rename the spanish Getting LinuxCNC document (rebrand)

Signed-off-by: Sebastian Kuzminsky <seb@highlab.com>
docs: rename a french doc to match the english

Signed-off-by: Sebastian Kuzminsky <seb@highlab.com>
docs: rename a spanish doc (rebrand)

Signed-off-by: Sebastian Kuzminsky <seb@highlab.com>
docs: rename a french doc to match the english

Signed-off-by: Sebastian Kuzminsky <seb@highlab.com>
docs: remove superfluous :toc: attribute from french docs

This asciidoc attribute adds a Table of Contents at the top of the
document, but our build system already does that.

Signed-off-by: Sebastian Kuzminsky <seb@highlab.com>
docs: fix some markup problems in English and Spanish "Stepconf" doc

The French Stepconf document has this improved markup already, so i'm
copying from Francis.

Signed-off-by: Sebastian Kuzminsky <seb@highlab.com>
docs: fix some markup problems in English and Spanish "pncconf" doc

The French document has this improved markup already, so i'm copying
from Francis again.

Signed-off-by: Sebastian Kuzminsky <seb@highlab.com>
docs: remove instructions for upgrading 2.3 to 2.4

Signed-off-by: Sebastian Kuzminsky <seb@highlab.com>
docs: add an intro blurb to Getting LinuxCNC

Signed-off-by: Sebastian Kuzminsky <seb@highlab.com>
docs: add an intro blurb to "Updating LinuxCNC"

Signed-off-by: Sebastian Kuzminsky <seb@highlab.com>
docs: remove old 2.4->2.5 and 2.5->2.6 upgrade instructions

Signed-off-by: Sebastian Kuzminsky <seb@highlab.com>
docs: add 2.6->2.7 upgrade instructions

Signed-off-by: Sebastian Kuzminsky <seb@highlab.com>
docs: rename english Getting-Started document for consistency

Signed-off-by: Sebastian Kuzminsky <seb@highlab.com>