feat: Add route filtering to indexes

[zahid-syed]

Added the ability to filter routes. Initial commit and needs testing

Closes #194

[codecov]

Codecov Report

Attention: Patch coverage is 87.09677% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 78.18%. Comparing base (ca71efa) to head (f0f2126).

❗ Current head f0f2126 differs from pull request most recent head b88eb99. Consider uploading reports for the commit b88eb99 to get more accurate results

Files	Patch %	Lines
semantic_router/index/pinecone.py	25.00%	3 Missing ⚠️
semantic_router/index/local.py	93.75%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #209      +/-   ##
==========================================
+ Coverage   78.14%   78.18%   +0.03%     
==========================================
  Files          43       43              
  Lines        2233     2255      +22     
==========================================
+ Hits         1745     1763      +18     
- Misses        488      492       +4     

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