feat: add flag filter for custom analyzer

[naveenthangaraj03]

Closes #

📑 Description

ISSUES:

• Flag filter is not supported for custom-analyzer.
• If we have more than one custom analyzer need to run separate server for each custom analyzer.

RESOLVED:

• Flag filter is added for custom-analyzer, so we can define a lot of custom analyzer in a single server and run specific custom analyzer based on filter.

✅ Checks

• My pull request adheres to the code style of this project
• My code requires changes to the documentation
• I have updated the documentation as required
• All the tests have passed

ℹ Additional Information

[codecov]

Codecov Report

❌ Patch coverage is 39.43662% with 43 lines in your changes missing coverage. Please review.
✅ Project coverage is 44.80%. Comparing base (173e4dc) to head (ff47060).
⚠️ Report is 189 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/analysis/analysis.go	38.70%	36 Missing and 2 partials ⚠️
cmd/analyze/analyze.go	0.00%	5 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1574       +/-   ##
===========================================
+ Coverage   34.76%   44.80%   +10.03%     
===========================================
  Files          94      114       +20     
  Lines        6342     8356     +2014     
===========================================
+ Hits         2205     3744     +1539     
- Misses       4046     4423      +377     
- Partials       91      189       +98     

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[naveenthangaraj03]

@AlexsJones, Can you take a look into this PR

[naveenthangaraj03]

@AlexsJones , does this PR looks good?