Requirements Review and Update

[kaanyolcu22]

The requirements should be reviewed and modified appropiately to the needs and structure of the project .

[oktayozel]

@kaanyolcu22 Can u check updated version of requirements

Thank you so much.

Updates:

• Requirements for following people and semantic search added.
• Requirements for undoing operations are added.
• Requirements about how users post are added. *Guest requirements are rewritten in a correct format
• Wording of system requirements are updated.
• Some user keywords are converted to registered user.

[kaanyolcu22]

Thanks , it looks nice.