refactor: rename modules and update migration docs

BREAKING CHANGE
Module paths moved to `github.com/HugoBlox/kit` with new names:
- core `blox-tailwind` → `blox`
- analytics → `analytics`
- netlify → `integrations/netlify`
- slides (reveal) → `slides`
Update go.mod, module.yaml/params, scripts, tests, and v0.11 migration guide accordingly.

modules/blox/layouts/_markup/render-codeblock-markmap.html

@@ -0,0 +1,5 @@
+<div class="markmap" style="height: {{.Attributes.height | default "500px"}};">
+{{/* No indentation before PRE and .Inner otherwise mindmap first item will be indented */}}
+<pre>{{- .Inner | safeHTML -}}</pre>
+</div>
+{{ .Page.Store.Set "has_markmap" true }}