Added addConnect(), addPurge() and addTrace() to Router Group

[SidRoberts]

Hello!

• Type: new feature
• Link to issue:

In raising this pull request, I confirm the following:

• I have read and understood the Contributing Guidelines
• I have checked that another pull request for this purpose does not exist
• [-] I wrote some tests for this PR
• I updated the CHANGELOG

They exist in the Router so I assume the Router Group was forgotten about.

[codecov]

Codecov Report

Merging #14001 into 4.0.x will increase coverage by 0.08%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##            4.0.x   #14001      +/-   ##
==========================================
+ Coverage   67.92%      68%   +0.08%     
==========================================
  Files         469      469              
  Lines       94255    94327      +72     
==========================================
+ Hits        64019    64148     +129     
+ Misses      30236    30179      -57

Impacted Files	Coverage Δ
ext/phalcon/mvc/router/group.zep.c	60.8% <0%> (+26.14%)	⬆️

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[niden]

Thank you @SidRoberts