chore: release v0.4.0

[bartbeecoders]

Version bump to 0.4.0 across package.json, tauri.conf.json, Cargo.toml, and Cargo.lock (npm run bump).

Changes since v0.3.1

• feat(detail): searchable + fullscreen manifest viewer (feat(detail): searchable + fullscreen pod manifest viewer #5)
• feat(ui): wider, resizable describe dialog (feat(ui): wider, resizable describe dialog #6)
• feat(dashboard): zoom + pan on the world map (feat(dashboard): zoom + pan on the world map #7)
• feat: allow deleting a namespace (feat: allow deleting a namespace #8)
• feat: manage IngressClass, ClusterRole, ClusterRoleBinding (feat: manage IngressClass, ClusterRole, ClusterRoleBinding #9)
• fix(settings): widen page so the connections table isn't clipped (fix(settings): widen page so the connections table isn't clipped #10)

Minor bump — several new backward-compatible features. Once merged, tag v0.4.0 triggers the release build.

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