chore(electron): polish docs and hide connectToWorker/Worker.disconnect

[dgozman]

Summary

• Tweaks the v1.59 electron migration notes for clarity.
• Renames client BrowserType.connectToWorker and Worker.disconnect to _connectToWorker / _disconnect, removes them from the public docs and types. Server-side names and the protocol channel are unchanged.

[github-actions]

Test results for "tests 1"

3 flaky

⚠️ [firefox-library] › library/inspector/cli-codegen-1.spec.ts:1080 › cli codegen › should not throw csp directive violation errors `@firefox-ubuntu-22.04-node20`
⚠️ [firefox-page] › page/page-wait-for-function.spec.ts:104 › should work with strict CSP policy `@firefox-ubuntu-22.04-node20`
⚠️ [playwright-test] › ui-mode-trace.spec.ts:700 › should indicate current test status `@windows-latest-node20`

41476 passed, 847 skipped

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Merge workflow run.

[github-actions]

Test results for "MCP"

11 failed
❌ [chrome] › mcp/autowait.spec.ts:19 › racy navigation destroys context @mcp-windows-latest
❌ [chrome] › mcp/dashboard.spec.ts:185 › should start dashboard and annotate when no dashboard is running @mcp-windows-latest
❌ [chrome] › mcp/dashboard.spec.ts:207 › should enter annotate mode on fresh dashboard.tsx mount with -s --annotate @mcp-windows-latest
❌ [chrome] › mcp/dashboard.spec.ts:231 › should switch screencast to -s session on show --annotate @mcp-windows-latest
❌ [chromium] › mcp/dashboard.spec.ts:185 › should start dashboard and annotate when no dashboard is running @mcp-windows-latest
❌ [chromium] › mcp/dashboard.spec.ts:207 › should enter annotate mode on fresh dashboard.tsx mount with -s --annotate @mcp-windows-latest
❌ [chromium] › mcp/dashboard.spec.ts:231 › should switch screencast to -s session on show --annotate @mcp-windows-latest
❌ [firefox] › mcp/cli-json.spec.ts:177 › close-all after open returns closed sessions @mcp-windows-latest
❌ [firefox] › mcp/cli-session.spec.ts:129 › session reopen with different config @mcp-windows-latest
❌ [firefox] › mcp/network.spec.ts:90 › browser_network_requests numbers requests with stable indexes @mcp-windows-latest
❌ [webkit] › mcp/dashboard.spec.ts:185 › should start dashboard and annotate when no dashboard is running @mcp-macos-latest

1 flaky

⚠️ [chrome] › mcp/cdp.spec.ts:24 › cdp server `@mcp-windows-latest`

6809 passed, 927 skipped

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Merge workflow run.