Update IDS-DRR Documentation

[apoorv74]

• Update the model report document shared by Meenu. Use the IDEA-FRM report as reference - @jeenogeorge . Document created by Jeeno
• Include a section on Data Sources linked with the IDS-DRR Data Sources Github repo. Ensure that key decisions taken for each data source are documented as well. - @d-saikrishna
• Clean up the IDS-DRR Data Sources Repo - @d-saikrishna
• 800-word introduction for the platform - @jeenogeorge @d-saikrishna

[apoorv74]

• Clean the data dictionary
• Add the citation file for the repo. Check this for reference.

[apoorv74]

Comments on the project report - https://chat.civicdatalab.in/group/project-ids-drr-former-idea-frm?msg=rKWWFmSfsXppdz6Sa