chore(ci): simplify issue templates (#5919)

* chore(ci): simplify issue templates

* add task

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -1,12 +1,7 @@
 name: "🐛 Bug Report"
 description: "Uh-oh! Something not working?"
-title: "[Bug]: "
-labels: ["bug"]
-assignees: [dsheridan]
+type: "bug"
 body:
-  - type: markdown
-    attributes:
-      value: "### 🛠 Thanks for reporting a bug! Please provide the details below."
 
   - type: dropdown
     id: product

.github/ISSUE_TEMPLATE/documentation_writing.yml

@@ -1,12 +1,8 @@
 name: "📖 Documentation Improvement"
 description: "Something missing or incorrect in our docs (buildwithfern.com/learn)?"
-title: "[Docs]: "
 labels: ["documentation"]
-assignees: [dsheridan]
+type: "task"
 body:
-  - type: markdown
-    attributes:
-      value: "### 📖 Thanks for helping improve the docs! Please provide details below."
 
   - type: dropdown
     id: issue-type

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -1,12 +1,7 @@
 name: "✨ Feature Request"
 description: "How can we make Fern even more awesome?"
-title: "[Feature]: "
-labels: ["enhancement"]
-assignees: [dsheridan]
+type: "feature"
 body:
-  - type: markdown
-    attributes:
-      value: "### 🚀 Thanks for helping make Fern better! Please fill out the details below."
 
   - type: dropdown
     id: product