[TypeSpec Authoring][Telemetry] Conduct user study with early adopters

## Summary

Conduct user study sessions with early adopters of the **azure-typespec-author** Copilot skill to gather qualitative feedback on authoring experience, output quality, and pain points.

Parent epic: #14902 (Channel #3 — User Conversations).

## Goals

- Validate whether the skill is solving real authoring problems for early adopters.
- Identify the top pain points and friction in the end-to-end flow (skill invocation → plan → generation → validation).
- Surface unmet needs and prioritize backlog items based on real user voice.
- Capture concrete prompts / scenarios that work well and ones that don't, to feed back into benchmark cases.

## Scope

1. **Recruit participants**
- Identify 5–8 early adopter teams / individuals currently authoring TypeSpec specs (ARM and data-plane).
- Mix of new authors and experienced authors.

2. **Prepare study materials**
- Interview script / question bank (open-ended + targeted).
- Optional task scenarios for think-aloud sessions (e.g., add a new API version, add a new resource, add a custom action).
- Consent / recording policy.

3. **Run sessions**
- 30–45 min each: 1:1 interview and/or observed task session.
- Capture: usage frequency, common prompts, output quality perception, blockers, workarounds, feature requests.

4. **Synthesize findings**
- Affinity-grouped themes, severity, frequency.
- Map each finding to existing epics / issues or file new ones.
- Share a readout with the team.

## Deliverables

- [ ] Interview script and task scenarios.
- [ ] Notes / recordings from each session (stored per privacy policy).
- [ ] Findings report with prioritized themes and action items.
- [ ] Backlog items filed (linked back to this issue) for the top issues raised.