chore(release): sync packaging manifests to 2.6.0

[Anandb71]

The v2.6.0 release workflow failed its version-sync gate: the workspace
version moved to 2.6.0 but the five release-facing manifests still declared
2.5.0, so every downstream job — build, crates.io publish, release assets,
checksum update — was skipped.

Bumps npm wrapper, VS Code extension, Scoop, agent-card, and the Homebrew
formula.

Checksums are deliberately untouched. The workflow's own Update Homebrew & Scoop checksums job rewrites those from the published release assets, which
do not exist until the build job runs.

[arbor-cloud]

⚪ Arbor PR Walk

Path heat	NONE ░░░░░░░░░░ 0%
Branch	chore/sync-manifests-2.6.0 → main
Impact	5 files · 0 symbols · 0 reachable callers
Languages	Ruby

No code symbols detected in changed files — this looks like a docs, config, or generated-code change.

📊 Analysis confidence: Low · 1727 nodes · 8325ms

• Ruby use dynamic typing — cross-file call edges are best-effort (may miss some relationships)
• No indexed symbols found in changed files

Suggestions to improve accuracy:

• Add type annotations (Python) or use TypeScript (JavaScript) for more precise analysis
• This may be a docs, config, or non-code change — no structural impact to report

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_{Arbor · View full report → · arbor v2.5.0 · 8325ms · 1727 nodes · verify locally with arbor diff · Deterministic PR blast-radius · Was this useful? 👍 👎}

[github-actions]

🌳 Arbor Impact Report

Risk Level: 🟢 Low | Blast Radius: 0 nodes | Changed Symbols: 2

Changed Files

File	Status
agent-card.json	Modified
extensions/arbor-vscode/package.json	Modified
packaging/homebrew/arbor.rb	Modified
packaging/npm/package.json	Modified
packaging/scoop/arbor.json	Modified

📊 Visual Impact Graph

graph TD
  classDef changed fill:#ef4444,stroke:#333,stroke-width:2px,color:#fff;
  classDef caller fill:#f59e0b,stroke:#333,stroke-width:1px,color:#fff;
  class Arbor changed;
  class install changed;

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Impact Summary

Metric	Count
Direct callers affected	0
Indirect callers affected	0
API entrypoints impacted	0
Files likely requiring updates	0
Total blast radius	0

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