Create project idea proposal issue template

Added a new issue template for proposing project ideas, including fields for project name, summary, goals, tech stack, and contributors.

Author: ajay-dhangar

.github/ISSUE_TEMPLATE/project_idea.yml

@@ -0,0 +1,64 @@
+name: Project Idea Proposal
+description: Suggest a new project or initiative for CodeHarborHub.
+title: "[Idea]: Project Title"
+labels:
+  - idea
+  - discussion
+assignees:
+  - ajay-dhangar
+body:
+  - type: markdown
+    attributes:
+      value: |
+        ## CodeHarborHub — Project Idea Proposal
+
+        Have a cool idea that fits CodeHarborHub’s mission of open-source tech education?  
+        Share it here so the community can collaborate!
+
+  - type: input
+    id: project_name
+    attributes:
+      label: Project Name
+      placeholder: e.g., AI Learning Portal or Open-Source Roadmaps
+    validations:
+      required: true
+
+  - type: textarea
+    id: idea_summary
+    attributes:
+      label: Idea Summary
+      description: Briefly explain what the project is and why it matters.
+      placeholder: e.g., A web platform that visualizes AI concepts interactively.
+    validations:
+      required: true
+
+  - type: textarea
+    id: goals
+    attributes:
+      label: Goals and Impact
+      placeholder: e.g., To help learners practice machine learning interactively.
+    validations:
+      required: true
+
+  - type: textarea
+    id: potential_tech
+    attributes:
+      label: Potential Tech Stack
+      placeholder: e.g., React, Node.js, MongoDB, TensorFlow.js
+    validations:
+      required: false
+
+  - type: textarea
+    id: contributors
+    attributes:
+      label: Contributors Needed
+      description: What roles are needed? (e.g., frontend dev, designer, mentor)
+      placeholder: e.g., 2 frontend devs, 1 mentor
+    validations:
+      required: false
+
+  - type: markdown
+    attributes:
+      value: |
+        ---
+        Once submitted, the community and maintainers will review and discuss your idea.