Rearrange development docs ToC

This is to make architecture the top link after changelog
and installation instructions. Also moves API to the bottom,
because it stands out of the reading flow, which is:

- see if the development thing you think about is already done
- launch installation if you're going to fix anything
- (or) read about archtecture
- about testing, probably installation is ready
- how to sync docs
- standards, etc.
- components (should be linked from archtecture)
- everything else
- leave API pages open

Author: techtonik

docs/index.rst

@@ -92,18 +92,18 @@ Information about development is also available:
    :maxdepth: 2
    :caption: Developer Documentation
 
-   install
-   api/index
    changelog
+   install
+   architecture
    tests
    docs
-   architecture
    development/standards
    development/buildenvironments
    symlinks
    settings
    i18n
    issue-labels
+   api/index
 
 .. _business-docs: