chore: add GitHub workflows and issue templates

Add CI/CD workflows for nightly releases and pull request builds, along with
structured issue templates for bug reports and suggestions.

- Nightly workflow builds and releases both client and server binaries for
  Windows, creating signed tags and GitHub releases with detailed instructions.
- Pull request workflow triggers builds on PR events to validate changes.
- Issue templates guide users in reporting bugs and suggesting enhancements,
  linking to community Discord for support.

.github/ISSUE_TEMPLATE/suggestion_request.yml

@@ -0,0 +1,34 @@
+name: Suggestion
+description: Suggest an idea for this project
+title: "[Suggestion] "
+labels: ["enhancement"]
+
+body:
+  - type: textarea
+    id: solution
+    attributes:
+      label: Describe the solution you'd like
+      description: What would you like to see happen?
+      placeholder: |
+        A clear and concise description of what you want to happen.
+    validations:
+      required: true
+      
+  - type: textarea
+    id: problem
+    attributes:
+      label: Is your suggestion related to a problem?
+      description: Describe the problem you are experiencing.
+      placeholder: |
+        A clear and concise description of what the problem is.
+        Example: I'm always frustrated when [...]
+    validations:
+      required: false
+
+  - type: textarea
+    id: additional
+    attributes:
+      label: Additional context
+      description: Add any other context, mockups, or screenshots here.
+    validations:
+      required: false