feat: Add support for dark mode node icons and colors

[elsmr]

Summary

• Add optional dark mode icons for nodes
• Add node icon color presets for core nodes

// How to define a dark mode icon (backwards compatible)
icon: { light: 'file:googleSheets.svg', dark: 'file:googleSheetsDark.svg' }
icon: 'file:googleSheets.svg'

// How to define icon color from preset (has priority over `defaults.color`)
iconColor: 'blue'

Related tickets and issues

https://linear.app/n8n/issue/NODE-1337/dark-mode-icons-on-dark-mode

Review / Merge checklist

• PR title and summary are descriptive. Remember, the title automatically goes into the changelog. Use (no-changelog) otherwise. (conventions)
• Docs updated or follow-up ticket created.
• Tests included.

  A bug is not considered fixed, unless a test is added to prevent it from happening again.
  A feature is not complete without tests.

[OlegIvaniv]

Nice job!
I didn't go through every single icon but from general browsing through the node creator and interacting with the canvas it all LGTM 👌

[github-actions]

✅ All Cypress E2E specs passed

[cypress]

1 flaky test on run #5319 ↗︎

0

356

0

0

1

Details:

🌳 🖥️ browsers:node18.12.0-chrome107 🤖 elsmr 🗃️ e2e/*
Project: n8n	Commit: 4d1cff8ba7
Status: Passed	Duration: 04:57 💡
Started: Jun 5, 2024 11:08 AM	Ended: Jun 5, 2024 11:13 AM

  cypress/e2e/5-ndv.cy.ts • 1 flaky test

View Output Video

Test		Artifacts
NDV > Stop listening for trigger event from NDV		Screenshots Video

Review all test suite changes for PR #9412 ↗︎

[janober]

Got released with [email protected]

[marzn]

This MR removes icon files, which are still referenced in some nodes:

• n8n/packages/nodes-base/nodes/ActiveCampaign/ActiveCampaignTrigger.node.ts

  Line 19 in 16d3083

  icon: 'file:activeCampaign.png',

• n8n/packages/nodes-base/nodes/Affinity/AffinityTrigger.node.ts

  Line 18 in 16d3083

  icon: 'file:affinity.png',

• n8n/packages/nodes-base/nodes/Amqp/AmqpTrigger.node.ts

  Line 20 in 16d3083

  icon: 'file:amqp.png',

• n8n/packages/nodes-base/nodes/Flow/FlowTrigger.node.ts

  Line 17 in 16d3083

  icon: 'file:flow.png',

• n8n/packages/nodes-base/nodes/LoneScale/LoneScaleTrigger.node.ts

  Line 18 in 16d3083

  icon: 'file:lonescale-logo.svg',

• n8n/packages/nodes-base/nodes/RabbitMQ/RabbitMQTrigger.node.ts

  Line 25 in 16d3083

  icon: 'file:rabbitmq.png',