fix(cz_customize): make schema_pattern customizable through config for cz_customize

[Lee-W]

Description

make schema_pattern customizable through config for cz_customize

Checklist

• Add test cases to all the changes you introduce
• Run ./script/format and ./script/test locally to ensure this change passes linter check and test
• Test the changes on the local machine manually
• Update the documentation for the changes

Expected behavior

configure schema_pattern in the configuration file should make cz check work for cz_customize

Steps to Test This Pull Request

1. cz init (Choose cz_customize)
2. add schema_pattern to configuration file
3. run cz check

Additional context

#273

[codecov]

Codecov Report

Merging #276 into master will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #276      +/-   ##
==========================================
+ Coverage   96.61%   96.63%   +0.02%     
==========================================
  Files          33       33              
  Lines         915      921       +6     
==========================================
+ Hits          884      890       +6     
  Misses         31       31              

Flag	Coverage Δ
#unittests	96.63% <100.00%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
commitizen/__version__.py	100.00% <100.00%> (ø)
commitizen/commands/check.py	100.00% <100.00%> (ø)
commitizen/cz/customize/customize.py	93.61% <100.00%> (+0.28%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update d8e9bad...5b56b7e. Read the comment docs.