Add valid data table and sample for editing data file in user guide#262

Merged

iynixil merged 9 commits intoAY2324S2-CS2103-F08-3:masterfrom tsulim:252-sample-data-ug

Apr 15, 2024

+83-8

Commits on Apr 13, 2024

Commits on Apr 15, 2024

Modify subheading of valid data value tables
tsulim
committed