feat: enhance element detail and middleware

[chenshenhai]

• feat(core): optimize text editing middleware
• feat(renderer,board): add options for overriding element in render
• feat(util,renderer): enhance font family
• feat(renderer): improve text render
• feat(renderer): add global.background render

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0.96154% with 103 lines in your changes are missing coverage. Please review.

Project coverage is 7.32%. Comparing base (39478d0) to head (a2979cd).
Report is 117 commits behind head on main.

Files	Patch %	Lines
packages/renderer/src/draw/box.ts	0.00%	35 Missing and 5 partials ⚠️
packages/renderer/src/draw/text.ts	0.00%	17 Missing and 13 partials ⚠️
packages/core/src/middleware/text-editor/index.ts	0.00%	9 Missing and 5 partials ⚠️
packages/renderer/src/draw/global.ts	0.00%	5 Missing and 1 partial ⚠️
packages/renderer/src/draw/group.ts	0.00%	2 Missing and 2 partials ⚠️
packages/renderer/src/draw/layout.ts	0.00%	1 Missing and 2 partials ⚠️
packages/board/src/lib/sharer.ts	0.00%	2 Missing ⚠️
packages/renderer/src/index.ts	0.00%	2 Missing ⚠️
packages/core/src/middleware/selector/index.ts	0.00%	0 Missing and 1 partial ⚠️
packages/util/src/lib/text.ts	50.00%	1 Missing ⚠️

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Additional details and impacted files

@@           Coverage Diff            @@
##            main    #319      +/-   ##
========================================
- Coverage   7.40%   7.32%   -0.08%     
========================================
  Files         92      94       +2     
  Lines       5944    6022      +78     
  Branches    1131    1150      +19     
========================================
+ Hits         440     441       +1     
- Misses      4428    4486      +58     
- Partials    1076    1095      +19     

Flag	Coverage Δ
unittests	7.32% <0.96%> (-0.08%)	⬇️

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