feat(card): add :mode to root and header components

[kiaking]

This PR adds :mode to <SCard> and <SCardHeaderTitle>. This is to create this kind of card 👀 It adds "mode" to the border.

Note that <SCardFooterAction> already supports this by inheriting <SButton> props.

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[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.04% 🎉

Comparison is base (cc26861) 84.41% compared to head (879c392) 84.45%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #325      +/-   ##
==========================================
+ Coverage   84.41%   84.45%   +0.04%     
==========================================
  Files         139      139              
  Lines       11084    11113      +29     
  Branches      491      492       +1     
==========================================
+ Hits         9357     9386      +29     
  Misses       1727     1727              

Files Changed	Coverage Δ
lib/components/SCard.vue	100.00% <100.00%> (ø)
lib/components/SCardHeaderTitle.vue	100.00% <100.00%> (ø)

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