Github-actions-for-labellingmerging-pr's , assigning issues and adding custom labels for newly created issues

[vivekreddy049]

fixes #8 i created three workflows [ ASSIGNING ISSUE] When you use the ".assign" trigger, it automatically assigns you to an unclaimed issue. However, if someone else has already taken the issue, you won't be able to assign it to yourself.

Using the ".assign" trigger will assign you to an available issue, but if someone else has already claimed it, you won't be able to assign it to yourself.

When you attempt to use the ".assign" trigger, it will assign you to an unassigned issue, unless someone else has already taken it, in which case you cannot assign it to yourself.

[LABELLING NEW ISSUES ] Automatically, it assigns the labels "hacktober" and "hactoberfest2023" to newly created issues in the alternate workflow.

[dhaneshragu]

@vivekreddy049 only issue labeller is working. remaining two are not working. kindly test properly and make a PR