Added New API - Library API

New_APIs/LibraryApi/.gitignore

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+node_modules

New_APIs/LibraryApi/Readme.md

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+# Description
+It is a library API which can be use to manage library data and library management.
+
+# Installation
+First of all clone the repository and navigate to this directory. Then run the following commands
+```
+npm i
+cd src
+node index.js
+```
+
+# End Points
+### GET /api/v1/books
+Returns the list of all books present in the library
+### POST /api/v1/books
+Add books to the library and it takes body parameters
+### GET /api/v1/borrowers
+Returns the list of all borrowers and their details
+### POST /api/v1/borrowers
+Add a borrower with details
+### GET /api/v1/return/:id
+Deletes a borrowers record when he/she had returned it
+### GET /api/v1/search
+Searches for the given book in the library
+
+This can be use in real time also if we use Mongo DB