doc: use issue templates for gitlab

.github/ISSUE_TEMPLATE/ask-a-question.md → .gitlab/issue_templates/ask-a-question.md

 ---
 name: Ask a Question
-about: Ask a question about this template.
+about: Ask a question about duniter-v2s.
 title: ""
 labels: question
 assignees: ""

.github/ISSUE_TEMPLATE/report-a-bug.md → .gitlab/issue_templates/report-a-bug.md

 ---
 name: Report a Bug
-about: Report a problem with this template.
+about: Report a problem with duniter-v2s.
 title: ""
 labels: bug
 assignees: ""
@@ -8,9 +8,7 @@ assignees: ""
 
 **Description**
 
-_Tell us what happened. In particular, be specific about any changes you made to this template.
-Ideally, provide a link to your project's GitHub repository. Please note that we are not able to
-support all conceivable changes to this template project, but the more information you are able to
+_Tell us what happened. Please elaborate, the more information you are able to
 provide the more equipped we will be to help._
 
 **Steps to Reproduce**
@@ -33,7 +31,7 @@ _Describe the environment in which you encountered this bug. Use the list below
 and add additional information if you think it's relevant._
 
 - Operating system:
-- Template version/tag:
+- Git commit/tag:
 - Rust version (run `rustup show`):
 
 **Logs, Errors or Screenshots**

.github/ISSUE_TEMPLATE/suggest-a-feature.md → .gitlab/issue_templates/suggest-a-feature.md

 ---
 name: Suggest a Feature
-about: Suggest a new feature or an improvement to an existing feature for this template.
+about: Suggest a new feature or an improvement to an existing feature for duniter-v2s.
 title: ""
 labels: enhancement
 assignees: ""
@@ -9,8 +9,8 @@ assignees: ""
 **Motivation**
 
 _Describe the need or frustration that motivated you to make this suggestion. Please note that the
-goal of this project is to provide a general-purpose template project, so please take care when
-suggesting features that may be specific to a particular use case._
+goal of this project is to bring the Ğ1 blockchain itself, so please take care when
+suggesting features that may not concern the Ğ1 currency._
 
 **Suggested Solution**