[mutter/bilelmoussaoui/docs-readme] readme: Add links to the API documentation

[Bilal Elmoussaoui <bilelmoussaoui src gnome org>]

commit 22ba228b9d680f47887bc41abd7f13fe1071ffb8
Author: Bilal Elmoussaoui <bil elmoussaoui gmail com>
Date:   Fri Jun 3 17:38:57 2022 +0000

    readme: Add links to the API documentation
    
    Fixes #341

 README.md | 8 ++++++++
 1 file changed, 8 insertions(+)
---
diff --git a/README.md b/README.md
index 62c8944072..7e157af75e 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,14 @@ To contribute, open merge requests at https://gitlab.gnome.org/GNOME/mutter.
 It can be useful to look at the documentation available at the
 [Wiki](https://gitlab.gnome.org/GNOME/mutter/-/wikis/home).
 
+The API documentation is available at:
+- Meta: <https://gnome.pages.gitlab.gnome.org/mutter/meta/>
+- Clutter: <https://gnome.pages.gitlab.gnome.org/mutter/clutter/>
+- Cally: <https://gnome.pages.gitlab.gnome.org/mutter/cally/>
+- Cogl: <https://gnome.pages.gitlab.gnome.org/mutter/cogl/>
+- CoglPango: <https://gnome.pages.gitlab.gnome.org/mutter/cogl-pango/>
+
+
 ## Coding style and conventions
 
 See [HACKING.md](./HACKING.md).