docs: center images and tables

docs/index.md

@@ -28,23 +28,20 @@ will natively work with [Klipper](https://github.com/klipper3d/klipper) and [Moo
 
 KlipperScreen has been created and maintained by Jordan Ruthe from 2020 to 2021
 
-| Donate to Jordan                                 |
+Donate to Jordan: [Patreon](https://www.patreon.com/klipperscreen) [Ko-fi](https://ko-fi.com/klipperscreen)
-|--------------------------------------------------|
+
-| [Patreon](https://www.patreon.com/klipperscreen) |
-| [Ko-fi](https://ko-fi.com/klipperscreen)         |
 
 The current maintainer is Alfredo Monclus (alfrix) from 2021 onwards
 
-| Dontate to Alfrix                 |
+Donate to Alfredo: [Ko-fi](https://ko-fi.com/alfrix)
-|-----------------------------------|
-| [Ko-fi](https://ko-fi.com/alfrix) |
 
-thanks to all the people who helped along the way.
+thanks to all the [contributors](https://github.com/KlipperScreen/KlipperScreen/graphs/contributors) who helped along the way.
 
-[Contributors](https://github.com/KlipperScreen/KlipperScreen/graphs/contributors)
 
 ### Sponsors
 
 ![LDO](img/LDO-LOGO_SQ.png)
 
 Thank you [LDO](https://ldomotors.com/) for sponsoring KlipperScreen and the open source community.
+
+Thanks  YUMI 3D-EXPERT.FR for sponsoring KlipperScreen and the open source community.

docs/stylesheets/extra.css

@@ -0,0 +1,11 @@
+img {
+  display: block;
+  margin: 0 auto;
+}
+
+.md-typeset .md-typeset__table {
+  display: block;
+}
+.md-typeset__table table:not([class]) {
+  display: table;
+}

mkdocs.yml

@@ -78,3 +78,6 @@ extra:
       - icon: fontawesome/brands/discord
         link: https://discord.klipper3d.org/
       - icon: fontawesome/brands/python
+
+extra_css:
+      - stylesheets/extra.css