[bugfix] Fix i18n linting errors (#6170)

## Summary
- Fix i18n linting errors by adding missing locale keys to
`src/locales/en/main.json`
- Update all affected components to use `$t()` for internationalization

## Changes
Added the following locale keys:
- `comfyOrgLogoAlt`: "ComfyOrg Logo"
- `comfy`: "Comfy"
- `pressKeysForNewBinding`: "Press keys for new binding"
- `defaultBanner`: "default banner"
- `enableOrDisablePack`: "Enable or disable pack"
- `openManager`: "Open Manager"
- `graphNavigation`: "Graph navigation"

Updated components to use i18n keys:
- `ComfyOrgHeader.vue`
- `KeybindingPanel.vue`
- `PackBanner.vue`
- `PackIcon.vue`
- `PackEnableToggle.vue`
- `LoadWorkflowWarning.vue`
- `SubgraphBreadcrumb.vue`
- `SignInContent.vue`

## Test plan
- [x] Run `pnpm lint` - all i18n linting errors resolved
- [x] Pre-commit hooks pass

Aim to make #5625 CI/CD pass.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6170-bugfix-Fix-i18n-linting-errors-2926d73d365081c3b7fbcbbf4a8e03d6)
by [Unito](https://www.unito.io)

Co-authored-by: Claude <noreply@anthropic.com>

src/components/dialog/content/setting/KeybindingPanel.vue

@@ -89,7 +89,7 @@
           ref="keybindingInput"
           class="mb-2 text-center"
           :model-value="newBindingKeyCombo?.toString() ?? ''"
-          placeholder="Press keys for new binding"
+          :placeholder="$t('g.pressKeysForNewBinding')"
           autocomplete="off"
           fluid
           @keydown.stop.prevent="captureKeybinding"