Holiday 2023 promo

[huynhicode]

📑 Summary

This PR contains updates related to the Holiday 2023 promo:

• announcement bar with verbiage
• Announcements page with verbiage

Resolves #

📏 Design Decisions

Design decisions are from the Mermaid Chart team.

📋 Tasks

Make sure you

• 📖 have read the contribution guidelines
• 💻 have added necessary unit/e2e tests.
• 📓 have added documentation. Make sure MERMAID_RELEASE_VERSION is used for all new features.
• 🔖 targeted develop branch

Screenshots:

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[codecov]

Codecov Report

Merging #5080 (a1563c9) into master (cbc97da) will decrease coverage by 32.72%.
Report is 6 commits behind head on master.
The diff coverage is n/a.

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #5080       +/-   ##
===========================================
- Coverage   75.65%   42.94%   -32.72%     
===========================================
  Files         164       23      -141     
  Lines       13820     4972     -8848     
  Branches      693       21      -672     
===========================================
- Hits        10455     2135     -8320     
+ Misses       3200     2836      -364     
+ Partials      165        1      -164     

Flag	Coverage Δ
e2e	?
unit	42.94% <ø> (ø)

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see 160 files with indirect coverage changes