docs: add Backlog Entry issue template

.gitea/issue_templates/backlog_entry.md

@@ -0,0 +1,35 @@
+---
+name: Backlog Entry
+about: Create a backlog entry
+title: "Implement User Authentication (Delete this entry. Use Issue title)"
+---
+
+**Category:** Development **(Delete this entry. Use Labels)**
+
+**Priority:** High **(Delete this entry. Use Labels)**
+
+**Description:**
+Develop user authentication system to secure the application and allow registered users to log in and access their accounts.
+
+**Acceptance Criteria:**
+- Users can register with an email and password.
+- Passwords are securely hashed and stored.
+- Registered users can log in with their credentials.
+- Successful login redirects users to their dashboard.
+- Failed login attempts display an error message.
+- Password reset functionality is available.
+- User authentication is integrated with the database.
+
+**Estimation:** 5 story points
+
+**Due Date:** 2023-12-15 **(Delete this entry. Set in sidebar after creating the issue)**
+
+**Dependencies:** None **(Delete this entry. Set in sidebar after creating the issue)**
+
+**References:** 
+- User Authentication User Story (link)
+- Authentication API Documentation (link)
+
+**Status:** Not Started (User) **(Delete this entry. Kanban board in Projects tab of this repository)**
+
+**Notes:** This is a critical feature for user access control. It's a foundational component that must be in place before moving on to other user-related features.