Add new rule AG0041 for detecting and converting logs to templates

[joeldickson]

resolves #183

[szaboopeeter]

Should we cover:

• String.Format?
• declaration outside of the logger call (something like this):

[szaboopeeter]

Just my 2 cents but I would optimize for readability instead of reduced code duplication in this case. I find the test cases a bit difficult to follow when I need to do string temp laying in my head.

Edit: or maybe just inlining all the usings and privates into the template to reduce noise from the test cases might also help.

[rannes]

I go the other way.
I love to use test cases. Just keep the test function itself really straight-forward and it should be basically:
"Setup", "Input", "expectedOutput" type of tests.

Then you can just read the TestDate and understand all the different tests cases.

[joeldickson]

i agree about test readability, i'll fix it up in another MR, there's 2 like this now, so I'll come up with a better solution and fix them all in one go

[codecov]

Codecov Report

Attention: Patch coverage is 79.24528% with 22 lines in your changes missing coverage. Please review.

Project coverage is 74.42%. Comparing base (63f0bc8) to head (5964215).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...Analyzers/AgodaCustom/AG0041LogTemplateAnalyzer.cs	73.68%	3 Missing and 7 partials ⚠️
...c/Agoda.Analyzers/Properties/Resources.Designer.cs	0.00%	9 Missing ⚠️
...oda.Analyzers/AgodaCustom/AG0041CodeFixProvider.cs	96.55%	1 Missing and 1 partial ⚠️
...yzers/AgodaCustom/CustomRulesResources.Designer.cs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #184      +/-   ##
==========================================
+ Coverage   74.20%   74.42%   +0.22%     
==========================================
  Files          64       67       +3     
  Lines        2322     2428     +106     
  Branches      273      290      +17     
==========================================
+ Hits         1723     1807      +84     
- Misses        537      551      +14     
- Partials       62       70       +8     

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