docs: adds Linda's user stories (#303)

Author: lquinoa252

lesson_05/lindaquinoa/README.md

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+## Lesson 05 - User Stories
+
+### Story 1: Wishlist Streamlining
+**As a** Amazon user
+
+**I want** items on my wishlists automatically cross referenced
+
+**So that** there are no repeat items in any queue.
+
+**Acceptance Criteria:**
+- When a user adds an item to a wishlist, the system checks across all existing wishlists for duplicates.  
+- If a duplicate item is found, the user receives a prompt with options to keep it in both lists or only one.  
+- The system prevents identical items from being added twice to the same wishlist.  
+- Users can manually review and merge duplicate items across wishlists through a “Manage Duplicates” option.  
+
+### Story 2: Payment Failsafe
+**As a** CashApp user
+
+**I want** a one minute window to cancel or recall a payment
+
+**So that** there are no payments sent in error or to the wrong recipient.
+
+**Acceptance Criteria:**
+- Countdown timer (60 seconds) populates indicating the cancellation window after sending a payment.
+- “Cancel Payment” button within that window available to stop the transaction.
+- Notification sent to user upon successful cancellation.
+- After 60 seconds pass, the “Cancel Payment” option disappears and the transaction is final.
+
+### Story 3: Document Review and Edits
+**As a** Google Docs user
+
+**I want** to leave comments and corrections in the margins and between lines
+
+**So that** I can provide feedback and edits without altering the document
+
+**Acceptance Criteria:**
+- Users can highlight text or place the cursor between lines and insert a comment or suggested correction.  
+- Comments appear visually distinct in the right-hand margin or inline suggestion mode, without changing the original text.  
+- Other collaborators can reply to, resolve, or accept/reject suggested corrections.  
+- Resolved comments and corrections are archived but still accessible in the document history.