Added tabs block, added transition

[dnbute]

Please always provide the GitHub issue(s) your PR is for, as well as test URLs where your change can be observed (before and after):

Fixes #84

• Added tabs block
• Added fade transition when switching tabs, implemented for tabs and hero-horizontal-tabs
• Small change to network-item due to an icon being shorter now
• Updated spaced style to not change heading color

Test URLs:

• Original: https://www.sunstar.com/about/business-performance/

• Before: https://main--sunstar--hlxsites.hlx.page/_drafts/dbute/tabs/tabs

• After: https://tabs--sunstar--hlxsites.hlx.page/_drafts/dbute/tabs/tabs

• If you are adding a new block or a variation to an existing block, please fill below:

  Block library path: https://--sunstar--hlxsites.hlx.page/tools/sidekick/library.html?plugin=blocks&path=/sidekick/blocks/&index=0

[aem-code-sync]

Hello, I'm the AEM Code Sync Bot and I will run some test suites that validate the page speed.
In case there are problems, just click the checkbox below to rerun the respective action.

• Re-run PSI Checks

[aem-code-sync]

Page	Scores	Audits	Google
/_drafts/dbute/tabs/tabs

[bosschaert]

LGTM

[aem-code-sync]

Page	Scores	Audits	Google
/_drafts/dbute/tabs/tabs

[aem-code-sync]

Page	Scores	Audits	Google
/_drafts/dbute/tabs/tabs

[github-actions]

🔸 1 visual difference detected

• /sidekick/blocks/sections (main vs branch)
  Expected an image 1312px by 6512px, received 1312px by 6295px. 320968 pixels (ratio 0.04 of all image pixels) are different.

The diff images are attached in the artifact

[dnbute]

🔸 1 visual difference detected

• /sidekick/blocks/sections (main vs branch)Expected an image 1312px by 6512px, received 1312px by 6295px. 320968 pixels (ratio 0.04 of all image pixels) are different.

The diff images are attached in the artifact

This is due to adding new styles to the library