chore: remove upstream issue templates for Sentry SDK light exports

[MathurAditya724]

Summary

• Removes tracking files for potential @sentry/bun/light and @sentry/core/light features in sentry-javascript
• These upstream issue templates are no longer needed

[github-actions]

Semver Impact of This PR

🟢 Patch (bug fixes)

📋 Changelog Preview

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New Features ✨

• (dashboard) Add layout/position flags to widget edit and add commands by BYK in #591
• (init) Surface server-provided detail in spinner messages by MathurAditya724 in #588
• AsyncIterable streaming support for library SDK by BYK in #586

Bug Fixes 🐛

Dashboard

• Normalize numeric org IDs from DSN auto-detection by BYK in #593
• Show actionable error messages instead of raw API errors by BYK in #592

Other

• (auth) Skip stale cached user info for env var tokens in auth status by BYK in #589
• (upgrade) Move delta patch log.info outside spinner callback by BYK in #590

Internal Changes 🔧

• Remove upstream issue templates for Sentry SDK light exports by MathurAditya724 in #596

• Regenerate skill files and command docs by github-actions[bot] in 0276f760

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