chore: Rework req res hook

[codekeyz]

• Re-implement route groups (Reconciling Spanner Nodes & Index Offset)
• Re-implement Request/Response Hooks.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 59.04762% with 43 lines in your changes missing coverage. Please review.

Project coverage is 70.87%. Comparing base (0be851e) to head (201b9a4).

Files with missing lines	Patch %	Lines
packages/spanner/lib/src/tree/tree.dart	61.36%	17 Missing ⚠️
...ges/pharaoh/lib/src/middleware/request_logger.dart	0.00%	11 Missing ⚠️
packages/spanner/lib/src/route/action.dart	0.00%	9 Missing ⚠️
packages/pharaoh/lib/src/http/router.dart	86.66%	2 Missing ⚠️
...ackages/spanner/lib/src/parametric/definition.dart	0.00%	2 Missing ⚠️
packages/pharaoh/lib/src/http/request_impl.dart	0.00%	1 Missing ⚠️
...es/pharaoh/lib/src/http/router/router_handler.dart	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #138      +/-   ##
==========================================
- Coverage   71.51%   70.87%   -0.64%     
==========================================
  Files          45       43       -2     
  Lines        1534     1528       -6     
==========================================
- Hits         1097     1083      -14     
- Misses        437      445       +8     

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