docs: categorize open GitHub issues by complexity and challenge level

[bohandley]

What

Adds docs/github-issues-categorization.md — a comprehensive categorization of all 109 open GitHub issues by coding complexity, challenge level, and work type.

Categories

Category	Count	Description
Good First Issues	15	Well-scoped tasks ideal for new contributors (a11y fixes, code cleanup, doc updates)
Small Bugs	11	Isolated fixes with clear symptoms, touching 1–3 files
Medium Complexity	25	Multi-file feature work, a11y improvements, chores/refactors
Large / Architectural	16	Framework migrations, performance overhauls, new subsystems
Research Spikes	7	Investigation tasks producing design docs, not production code
Operations / CI / Tooling	13	Deployment automation, dashboards, Slack integrations
Testing Infrastructure	4	E2E test environment and coverage improvements
Epics / Meta	8	Parent/tracking issues (not directly assignable)
Blocked / External	2	Waiting on upstream changes
Cross-Team / Integration	4	Work requiring coordination with other Grafana teams

Why

To help the team prioritize work, onboard new contributors with appropriate "good first issues," and understand the overall shape of the backlog at a glance.

  

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