feat[notask]: add QIP proposal skills

[yuranich]

What problem does this PR solve?

Teams need lightweight AI help for deciding exactly which improvement changes need QIPs, shaping proposal drafts for iteration, and reviewing QIPs before Slack Canvas approval without recreating the rejected ADR automation process.

How does it solve it?

Adds Cursor skills for conservative QIP significance checks, proposal drafting, and proposal review, plus a small non-eager rule nudge and skill catalog entries. The significance check now identifies exact QIP-worthy points and whether they belong in one proposal or several. The drafting skill now saves non-trivial drafts as markdown files, writes Solution sections as design explanations instead of task lists, and treats the template Risks section as consequences and trade-offs for proposal review.

Breaking changes

None.

Validation

• ReadLints reported no issues for the updated QIP skill files.
• git diff --check HEAD~1..HEAD passed for the latest commit.

Demo

https://drive.google.com/file/d/1opVhdulcFYOTaLdEX_ygTCdwRjj2Dsdx/view?usp=sharing

[lauripiisang]

approved, pending the testing shows it doesn't overtrigger or get in the way much -
Would appreciate some testing results in general of course.

[yuranich]

/review

[github-actions]

Tier-based Approval Status

**PR Tier:** TIER1

**Current Status:** ✅ APPROVED

**Requirements:**
- 1 Team Member approval ✅ (1/1)
- 1 Team Lead OR Management approval ✅ (1/1)



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