feat: Add size attribute to farm

Backend/Controllers/farm.controller.js

@@ -5,11 +5,12 @@ const Finance = require("../Models/finance.model.js");
 // Create a farm
 const createFarm = async (req, res) => {
   try {
-    const { name, location, waterContent, soilType } = req.body;
+    const { name, location, waterContent, soilType, size } = req.body;
 
     const farm = new Farm({
       name,
       location,
+      size,
       waterContent,
       soilType,
       owner: req.user._id,

Backend/Models/farm.model.js

@@ -9,6 +9,7 @@ const farmSchema = new mongoose.Schema(
       ref: "User",
       required: true,
     },
+    size: { type: String },
     waterContent: { type: String, required: true },
     soilType: { type: String, required: true },
     fertilizer: [