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.

test/config.yaml

@@ -5,7 +5,7 @@ build:
     enable: true
 module:
   imports:
-    - path: github.com/HugoBlox/kit/modules/blox-tailwind
+    - path: github.com/HugoBlox/kit/modules/blox
 outputs:
   home: [HTML, RSS, WebAppManifest]
 disableAliases: true

test/go.mod

@@ -2,5 +2,5 @@ module github.com/HugoBlox/kit/test
 
 go 1.15
 
-require github.com/HugoBlox/kit/modules/blox-tailwind v0.0.0
-replace github.com/HugoBlox/kit/modules/blox-tailwind => ../modules/blox-tailwind
+require github.com/HugoBlox/kit/modules/blox v0.0.0
+replace github.com/HugoBlox/kit/modules/blox => ../modules/blox