Chore: Update pull request template for clarity and structure

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,48 +1,73 @@
-### PR Description
-<!-- Provide a brief summary of the changes you have made. Explain the purpose and motivation behind these changes. -->
+<!--
+Hey there! Thanks for opening a PR.
+
+This file is a template for pull requests. 
+The comments (in <!-- -\->) are only visible in the raw markdown,
+
+so they won't show up in the final PR description.
+
+Fill out each section briefly. Keep it simple.
+-->
+
+### Summary
+
+<!--
+Short and to the point: What does this PR do and why?
+Example: "Adds Perlin noise to the fragment shader to generate a swirl effect."
+-->
 
 ### Related Issue
-<!-- Link to the related issue(s) that this PR addresses. Example: #123 -->
-
-### shader Sample
-<!-- Provide a shader sample or snippet on which you have tested your changes. like
-
-```crossgl
-shader PerlinNoise {
-    vertex {
-        input vec3 position;
-        output vec2 vUV;
-
-        void main() {
-            vUV = position.xy * 10.0;
-            gl_Position = vec4(position, 1.0);
-        }
-    }
-
-    // Perlin Noise Function
-    float perlinNoise(vec2 p) {
-        return fract(sin(dot(p, vec2(12.9898, 78.233))) * 43758.5453);
-    }
-
-    // Fragment Shader
-    fragment {
-        input vec2 vUV;
-        output vec4 fragColor;
-
-        void main() {
-            float noise = perlinNoise(vUV);
-            float height = noise * 10.0;
-            vec3 color = vec3(height / 10.0, 1.0 - height / 10.0, 0.0);
-            fragColor = vec4(color, 1.0);
-        }
-    }
+
+<!--
+If this PR addresses an open issue, use a phrase like:
+closes #123
+fixes #123
+resolves #123
+
+That way, GitHub links the issue to this PR and closes it automatically on merge.
+If it’s not fixing a specific issue, say so.
+-->
+
+### Changes
+
+<!--
+List the core changes.
+Example:
+- Implemented `perlinNoise()` in the fragment shader.
+- Tweaked the color output to highlight the noise value.
+-->
+
+### Shader Sample (Optional)
+
+<!--
+If you're touching shader code, provide a short snippet
+to show how you've tested or integrated these changes.
+
+Example:
+\`\`\`crossgl
+shader ExampleShader {
+    // ...
 }
-```-->
+\`\`\`
+-->
+
+### Testing
 
+<!--
+Tell us how you tested your changes.
+- Did you run existing tests?
+- Add any new tests?
+- Manually tested in a local environment?
+-->
 
 ### Checklist
-- [ ] Have you added the necessary tests?
-- [ ] Only modified the files mentioned in the related issue(s)?
-- [ ] Are all tests passing?
 
+<!--
+Check off each item as you go.
+Feel free to add or remove items that fit your repo's workflow.
+-->
 
+- [ ] Tests cover new or changed code (or reason why not)
+- [ ] Linked the issue with a closing keyword (if applicable)
+- [ ] Only touched files related to the issue
+- [ ] Everything builds and runs locally