unwrap hard-wrapped lines in PR template

[henryhng]

Summary

Rewrites each paragraph and checklist item as a single logical line and lets GitHub and the editor soft-wrap. Everything else was maintained.

Verification

• Checks run: n/a
• User workflow exercised: n/a.
• Data: n/a
• Backend and hardware: n/a
• Load/render/interaction timing: n/a
• Evidence artifacts or screenshots: this PR description

Core checklist (every PR)

• Before committing, inspect git status --short and git diff --stat; do not commit generated HTML, docs builds, screenshots, local notebooks, private data, or machine-specific notes.
• Only the sections below that this PR touches are kept; the rest are deleted from this description.

[bobleesj]

wrapping is useful for the human eyes, for cosmetics changes probably a good idea to make an GH issues before we decide to go to save time, before decision.