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/makefile

@@ -173,6 +173,7 @@ clean_figures:
 
 .PHONY: clean_ebook_build
 clean_ebook_build:
+	-rm  book*.loc
 	-rm  book*.aux
 	-rm  book*.run.xml
 	-rm  book*.bcf
@@ -198,6 +199,7 @@ clean_ebook_build:
 .PHONY: clean_website_build
 clean_website_build: clean_ebook_build
 	-rm book-*.svg
+	-rm book.loc
 	-rm book.dlog
 	-rm $(subst $(website_dir)/,, $(wildcard $(website_dir)/*.html))
 
@@ -205,6 +207,7 @@ clean_website_build: clean_ebook_build
 clean: clean_ebook_build clean_figures clean_website_build
 	$(CLEAN) -output-directory=book_serif book.tex
 	$(CLEAN) -output-directory=book_sans_serif book_sans_serif.tex
+	-rm  book*/*.loc
 	-rm  book*/*.bbl
 	-rm  book*/*.run.xml
 	-rm -rf book*-epub/META-INF