Feat/volunteer manual

✅ Description

This merge request introduces the Volunteer Manual feature to improve accessibility to onboarding and operational guidance for volunteers.

🔹 Changes Implemented

Added a Volunteer Manual link on the Login page below the Doctor Manual.

Configured navigation to redirect users to a dedicated page that renders the Volunteer Manual in a readable format.

Integrated the Markdown (.md) files along with supporting images for proper documentation display.

Created reusable components and pages to support manual viewing without affecting existing functionality.

🔹 Issue / Background

The previous working branch contained multiple unrelated changes, which made the commit history cluttered and difficult to review. To maintain a clean and focused code base:

✅ Extracted only the relevant commits related to the Volunteer Manual ✅ Created a new feature branch from the latest develop ✅ Cherry-picked the required commits to ensure minimal and clear changes

This MR now reflects only the intended feature without unrelated modifications.

🔹 Impact

No breaking changes.

Existing UI and workflows remain unaffected.

Improves usability by providing quick access to the Volunteer Manual directly from the Login page.

🔹 Testing

Verified that the Volunteer Manual link appears correctly on the Login page.

Confirmed navigation and proper rendering of the Markdown content.

Ensured responsiveness across screen sizes.