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.

scripts/list_language_packs.py

@@ -9,7 +9,7 @@
 import yaml
 from pathlib import Path
 
-LANG_PATH = Path(__file__).resolve().parent.parent.joinpath('blox-tailwind').joinpath('data').joinpath('i18n')
+LANG_PATH = Path(__file__).resolve().parent.parent.joinpath('modules').joinpath('blox').joinpath('data').joinpath('i18n')
 LANG_YAML = LANG_PATH.joinpath('languages.yaml')