Feature: 带参数的 RegexStr()

[ProgramRipper]

Match.group() 无参数时返回整个正则表达式匹配的字符串, 也可以通过传入参数获得特定的捕获组.
而 RegexStr() 现在只支持无参数调用, 不支持传入参数.

此 pull request 实现了向 RegexStr() 传入参数以获得特定捕获组的功能.
例：

matcher = on_regex(r"\[cq:(?P<type>.*?),(?P<arg>.*?)\]")


@matcher.handle()
async def _(type_: str = RegexStr(1), arg: str = RegexStr("arg")):
    ...

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (b939237) 92.07% compared to head (ae678a4) 92.07%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2499   +/-   ##
=======================================
  Coverage   92.07%   92.07%           
=======================================
  Files          47       47           
  Lines        3594     3596    +2     
=======================================
+ Hits         3309     3311    +2     
  Misses        285      285           

Flag	Coverage Δ
unittests	92.07% <100.00%> (+<0.01%)	⬆️

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[github-actions]

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