Remove all references to user: and project: prefixes

- Removed /user: prefix from all command examples
- Updated GitHub issue templates to remove /user: prefix
- Commands now use simple /command format without prefixes

This aligns with the project's decision to not use user:/project:
prefixes for commands.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -44,7 +44,7 @@ body:
         I would like to see...
 
         Example usage:
-        /user:newcommand --flag
+        /newcommand --flag
     validations:
       required: true
 
@@ -75,7 +75,7 @@ body:
       label: Examples
       description: Provide concrete examples of how this feature would work
       placeholder: |
-        Command: /user:example --new-flag
+        Command: /example --new-flag
         Output: Expected behavior...
 
         Persona usage:

.github/ISSUE_TEMPLATE/question.yml

@@ -55,7 +55,7 @@ body:
       description: Share relevant configuration or commands you're using
       placeholder: |
         ```
-        /user:command --flags
+        /command --flags
         Persona: architect
         Claude Code version: latest
         ```