Add book creation and listing features

[gaganaparvathi09]

Completed the GitHub Enablement Task.

• Added create_book feature
• Added list_all_books feature
• Merged feature into develop

[greptile-apps]

Greptile Summary

This PR adds two text files to the gagana_parvathi_book_app/add_books_feature/ directory as part of the GitHub Enablement Task, following the same pattern used by other contributors in this repository.

• create_book.txt describes a feature allowing authors to add new books.
• list_all_books.txt describes a feature to display all books a user has created, with ascending-order sorting noted.

Confidence Score: 5/5

Safe to merge — the change adds two plain-text description files to an isolated personal directory with no impact on shared code or configuration.

Both files are simple, isolated text descriptions that follow the established pattern for this enablement task. There are no functional, logical, or structural concerns.

No files require special attention.

Important Files Changed

Filename	Overview
gagana_parvathi_book_app/add_books_feature/create_book.txt	New text file describing the create_book feature for authors; content is minimal but matches the expected format for this enablement task.
gagana_parvathi_book_app/add_books_feature/list_all_books.txt	New text file describing the list_all_books feature with ascending-order sorting; follows the established pattern for this enablement task.

Sequence Diagram

%%{init: {'theme': 'neutral'}}%%
sequenceDiagram
    participant Author
    participant BookApp

    Author->>BookApp: create_book(title, details)
    BookApp-->>Author: Book created successfully

    Author->>BookApp: list_all_books()
    BookApp-->>Author: Returns all books in ascending order

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%%{init: {'theme': 'base', 'themeVariables': {"darkMode": true, "background": "#0d1117", "primaryColor": "#21262d", "primaryTextColor": "#e6edf3", "primaryBorderColor": "#8b949e", "lineColor": "#8b949e", "textColor": "#e6edf3", "edgeLabelBackground": "#161b22", "actorBkg": "#21262d", "actorBorder": "#8b949e", "actorTextColor": "#e6edf3", "actorLineColor": "#8b949e", "signalColor": "#8b949e", "signalTextColor": "#e6edf3", "noteBkgColor": "#373320", "noteBorderColor": "#d4a72c", "noteTextColor": "#f0e6c0", "labelBoxBkgColor": "#21262d", "labelBoxBorderColor": "#8b949e", "labelTextColor": "#e6edf3", "loopTextColor": "#e6edf3", "activationBkgColor": "#30363d", "activationBorderColor": "#8b949e"}}}%%
sequenceDiagram
    participant Author
    participant BookApp

    Author->>BookApp: create_book(title, details)
    BookApp-->>Author: Book created successfully

    Author->>BookApp: list_all_books()
    BookApp-->>Author: Returns all books in ascending order

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_{Reviews (1): Last reviewed commit: "Merge branch 'feature' into develop" | Re-trigger Greptile}