Add a flowchart environnement and its listof (#188)

* Add a flowchart environnement and its listof

So we can more easily access those flowcharts from pdf and website,
rather than looking in the crowded list of figures.

* Update book/troubleshooting/misc.tex

* Temporarily remove list of flow charts from web version

* Update clean target to deal with listofcharts

* Silent KOMA warnings (#190)

No functional change, but less warnings will help to read the logs.
Good idea anyway to use the key/value scheme

Co-authored-by: Cedric <ced@awase.ostal>

* Fix front-page for one sided printing (#189)

As it is manually placed, is prone to break on evry change of the page
geometry...  This one looks good though in today's conditions.

Co-authored-by: Cedric <ced@awase.ostal>

* Enable micro-typographical improvements (#191)

Few people will notice but this actually brings loads of improvements to
line breaking, handing punctuations etc.

* Revert "Temporarily remove list of flow charts from web version"

This reverts commit 9611b250d2.

* Implement listofflowchart for tex4ht

as per michal suggestion:
https://github.com/michal-h21/tex4ebook/issues/114#issuecomment-1688543095

---------

Co-authored-by: Cedric <ced@awase.ostal>
Co-authored-by: Hendrik Kleinwaechter <hendrik.kleinwaechter@gmail.com>

book/sourdough-starter/sourdough-starter.tex

@@ -131,14 +131,14 @@ not airtight. I~like to use a glass and place another
 inverted one on top. The container shouldn't be airtight,
 you still want some gas exchange to be possible.
 
-\begin{figure}[!htb]
+\begin{flowchart}[!htb]
 \begin{center}
   \input{figures/fig-starter-process.tex}
   \caption[Process for starter from scratch]{The process of making a sourdough
       starter from scratch.}%
   \label{fig:sourdough-starter-process}
 \end{center}
-\end{figure}
+\end{flowchart}
 
 Now an epic battle begins. In one study scientists
 have identified more than 150 different yeast species living
@@ -256,7 +256,7 @@ your sourdough starter will catch up. Similarly, modern baking
 yeast has been isolated like this from century old sourdough
 starters.
 
-\begin{figure}[!htb]
+\begin{flowchart}[!htb]
 \begin{center}
   \input{figures/fig-starter-readiness.tex}
   \caption[Sourdough readiness flow chart]{A flow chart showing you how to
@@ -265,7 +265,7 @@ starters.
       Both are important indicators to check for readiness.}%
   \label{fig:sourdough-starter-readiness}
 \end{center}
-\end{figure}
+\end{flowchart}
 
 The key signs to look at are bubbles that you see in your starter
 jar. This is a sign that the yeast is metabolizing your
@@ -326,7 +326,7 @@ yeast part of your sourdough and balance the fermentation.
 
 \section{Maintenance}
 
-\begin{figure}[!htb]
+\begin{flowchart}[!htb]
 \begin{center}
   \input{figures/fig-starter-maintenance.tex}
   \caption[Sourdough starter maintenance flowchart]{A full flowchart showing
@@ -338,7 +338,7 @@ yeast part of your sourdough and balance the fermentation.
       accordingly when you use a stiff starter.}%
   \label{fig:sourdough-maintenance-process}
 \end{center}
-\end{figure}
+\end{flowchart}
 
 You have made your sourdough starter and your first bread. How do you perform
 maintenance for your starter? There are countless different maintenance