[w-10592636] add .github/pull_request_template.md

.github/pull_request_template.md

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+# Writer's Quality Checklist
+
+Before merging your PR, did you:
+
+- [ ] Run spell checker
+- [ ] Run link checker to check for broken xrefs
+- [ ] Check for orphan files
+- [ ] Perform a local build and do a final visual check of your content, including checking for:
+  - Broken images
+  - Dead links
+  - Correct rendering of partials if they are used in your content
+  - Formatting issues, such as:
+    - Misnumbered ordered lists (steps) or incorrectly nested unordered lists
+    - Messed up tables
+    - Proper indentation
+    - Correct header levels
+- [ ] Receive final review and signoff from:
+  - Technical SME
+  - Product Manager
+  - Editor or peer reviewer
+  - Reporter, if this content is in response to a reported issue (internal or external feedback)
+- [ ] If applicable, verify that the software actually got released