takes file from user dynamicaly into dynamic_map.js

[HameedMulani]

Using Leaflet added this functionality In this, we can get .geoJson .csv file

Request @GisOpenSourceOrg to review it and give me feedback and if possible merge the code.

[GisOpenSourceOrg]

@HameedMulani , we are thankful to you 🥇 well done. Your code has been reviewed by our developer and it has merged by our team

[HameedMulani]

@GisOpenSourceOrg Thank you team @GisOpenSourceOrg 😄 I was eager and waiting for acceptance