make sweep optional in issues

.github/ISSUE_TEMPLATE/sweep-bugfix.yml → .github/ISSUE_TEMPLATE/bugfix.yml

 name: Bugfix
-title: "Sweep: "
+title: ""
 description: Write something like "We notice ... behavior when ... happens instead of ...""
-labels: sweep
 body:
   - type: textarea
     id: description

.github/ISSUE_TEMPLATE/sweep-feature.yml → .github/ISSUE_TEMPLATE/feature.yml

 name: Feature Request
-title: "Sweep: "
-description: Write something like "Write an api endpoint that does "..." in the "..." file"
-labels: sweep
+title: ""
+description: Write something like "Write an api endpoint that does "..." in the "..." file". If you would like to use sweep.dev prefix with "Sweep:"
 body:
   - type: textarea
     id: description
     attributes:
       label: Details
-      description: More details for Sweep
+      description: More details
       placeholder: The new endpoint should use the ... class from ... file because it contains ... logic

.github/ISSUE_TEMPLATE/sweep-refactor.yml → .github/ISSUE_TEMPLATE/refactor.yml

 name: Refactor
-title: "Sweep: "
-description: Write something like "Modify the ... api endpoint to use ... version and ... framework"
-labels: sweep
+title: ""
+description: Write something like "Modify the ... api endpoint to use ... version and ... framework" If you would like to use sweep.dev prefix with "Sweep:"
 body:
   - type: textarea
     id: description
     attributes:
       label: Details
-      description: More details for Sweep
+      description: More details
       placeholder: We are migrating this function to ... version because ...