…de) & Sugars module(Q, And, Or) & LambdaCases & pattern_compile->pattern_uncall & add pattern_unref

* support 'MLStyle.Modules.*'
* all tests passing
  - add '@testcase' macro and '@lift' marker in "runtests.jl". works perfectly for our cases.
* restore MLStyle.Render but deprecate it
* no need of 'MLStyle.Modules.AST.Compat' as now our pattern totally can somehow understand the scope info.
* fix duplicate @Label issues in when patterns('@when' from 'MLStyle.StandardPatterns.WhenCases'):
    - add 'CFGItem' and 'CFGSpec' types to MLStyle.AbstractPattern.
    - use CFGJump(CFGJump(:x) = CFGItem(:symbolicgoto, :x)) and CFGLabel(works the same way as CFGJump)
    - 'MLStyle.AbstractPattern.init_cfg':
      every time, when using generator functions from MLStyle APIs, such as 'gen_match', 'gen_switch',
      you should invoke 'MLStyle.AbstractPattern.init_cfg' before splicing it into your code.
* record matching:
   support 4 kinds of matching for records:
   1. positional:  S(a, b, c)
   2. field punning: S(; a, b=b_, c=c_), 'a, b, c' are names,  'b_, c_' are patterns
   3. wildcard constructor: S(_), if type of S matches. for compatibility, and consistency with active patterns
   4. just type check(same as 3): S()
* active pattern clarification:
   - S()  : if '@Active S(x)' returns true, otherwise(fail) returns false
   - S(v) : if '@Active S(x)' returns Some(v), otherwise(fail) returns nothing
   - S(a, b): more than 2 arguments, '@Active S(x)' returns a tuple
* fix some typos in documentations(cuture->cultural, etc)