fix: update module path from gitlab to git.unbound.se

Change the module path in various files to reflect the new 
repository location on git.unbound.se. Update imports in 
CLAUDE.md, error_test.go, and presenter_test.go to ensure 
compatibility with the updated module path. Remove outdated 
CI configuration in .pre-commit-config.yaml to streamline 
the setup. This enhances consistency and aligns the project 
with its new hosting platform.

.pre-commit-config.yaml

@@ -10,13 +10,6 @@ repos:
     args:
     - --allow-multiple-documents
   - id: check-added-large-files
-- repo: https://gitlab.com/devopshq/gitlab-ci-linter
-  rev: v1.0.6
-  hooks:
-  - id: gitlab-ci-linter
-    args:
-    - --project
-    - unboundsoftware/shiny/presenter
 - repo: https://github.com/alessandrojcm/commitlint-pre-commit-hook
   rev: v9.23.0
   hooks:
@@ -30,7 +23,7 @@ repos:
   - id: go-imports
     args:
     - -local
-    - gitlab.com/unboundsoftware/shiny/presenter
+    - git.unbound.se/shiny/presenter
 - repo: https://github.com/lietu/go-pre-commit
   rev: v1.0.0
   hooks: