feat: Add feature request template proposal

Final proposal for this PR (for now): the lab request template.
I foresee this one becoming the most used within the next couple of years.

Hoping this is enough.

Refs: [discussion](https://github.com/nishanb/CK-X/discussions/15_)

.github/ISSUE_TEMPLATE/lab-proposal.md

@@ -0,0 +1,73 @@
+---
+name: "🧪 Lab Request"
+about: Suggest a new lab to be added to the CK-X Simulator
+title: "[Lab] <short description of the lab>"
+labels: "lab-request"
+assignees: ''
+
+---
+
+## Lab Overview
+
+<!--
+Give a short summary of the lab idea.
+
+What is the main goal of the lab? 
+What skills or concepts should the user learn or demonstrate?
+-->
+
+## Target Audience
+
+<!--
+Who is this lab designed for?
+
+- CKA / CKS / KCNA / Custom?
+- Beginner, Intermediate, Advanced?
+- Any specific professional roles in mind (e.g. DevOps, SRE, Security Engineer)?
+-->
+
+## Topics & Scope
+
+<!--
+List the main topics covered by the lab.
+
+You can include:
+
+- Kubernetes area (e.g., RBAC, Networking, Cluster Maintenance, Security)
+- Concepts or tools used (e.g., Helm, Falco, etcd, NetworkPolicy)
+- Real-world scenarios or challenges (optional)
+-->
+
+## Lab Metadata
+
+<!-- Fill in the suggested values below -->
+
+- **Estimated Duration**: `<e.g., 45 minutes>`
+- **Difficulty**: `<easy / medium / hard>`
+- **Domain/Category**: `<e.g., Kubernetes / Security>`
+- **Total Score**: `<e.g., 100>`
+- **Passing Thresholds**:
+  - Low Score: `<e.g., 50>`
+  - Medium Score: `<e.g., 75>`
+  - High Score: `<e.g., 90>`
+
+## Example Exercises (optional)
+
+<!--
+Propose 1–3 example exercises that could be part of the lab.
+
+You can list the title, a short description, and the estimated points.
+
+1. **Create a NetworkPolicy** (20 points)
+   - Restrict traffic to a specific pod based on namespace and labels.
+2. **RBAC for Read-Only Access** (30 points)
+   - Grant a user read-only access to all resources in a namespace.
+-->
+
+## Additional Notes
+
+<!--
+Any extra info, references, or notes to support the lab request.
+
+This can include links to real CKA/CKS questions, documentation, or public repos.
+-->