[skip ci] Revert "Redirect the Feature Requests issue template tab (#1788)"

This reverts commit 3695435c3f.

Allow feature requests

Signed-off-by: WenHao2130 <wenhao2130@outlook.com>

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +0,0 @@
-blank_issues_enabled: false
-contact_links:
-  - name: Feature Request
-    url: https://github.com/tiann/KernelSU/issues/1705
-    about: "We do not accept external Feature Requests, see this link for more details."

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,39 @@
+name: Feature Request
+description: "Suggest an idea for this project"
+title: "[Feature]"
+labels: "feature"
+body:
+  - type: markdown
+    id: feature-info
+    attributes:
+      value: "## Feature Infomation"
+  - type: textarea
+    id: feature-main
+    validations:
+      required: true
+    attributes:
+      label: "Is your feature request related to a problem? Please describe."
+      description: "A clear and concise description of what the problem is."
+      placeholder: "I'm always frustrated when [...]"
+  - type: textarea
+    id: feature-solution
+    validations:
+      required: true
+    attributes:
+      label: "Describe the solution you'd like."
+      description: "A clear and concise description of what you want to happen."
+  - type: textarea
+    id: feature-describe
+    validations:
+      required: true
+    attributes:
+      label: "Describe alternatives you've considered."
+      description: "A clear and concise description of any alternative solutions or features you've considered."
+  - type: textarea
+    id: feature-extra
+    validations:
+      required: false
+    attributes:
+      label: "Additional context"
+      description: "Add any other context or screenshots about the feature request here."
+