Better BMP support

[digizeph]

This PR adds support for more BMP data types and fixes parsing issues for Statistics Report type (see #162).

The code base should be in sync with IANA BMP code definitions: https://www.iana.org/assignments/bmp-parameters/bmp-parameters.xhtml

[codecov]

Codecov Report

Attention: Patch coverage is 94.38202% with 10 lines in your changes are missing coverage. Please review.

Project coverage is 93.05%. Comparing base (1b62da4) to head (46e9580).
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/parser/bmp/messages/stats_report.rs	92.10%	6 Missing ⚠️
src/parser/bmp/messages/peer_down_notification.rs	92.10%	3 Missing ⚠️
src/parser/bmp/messages/peer_up_notification.rs	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #163      +/-   ##
==========================================
+ Coverage   93.04%   93.05%   +0.01%     
==========================================
  Files          65       65              
  Lines        8162     8304     +142     
==========================================
+ Hits         7594     7727     +133     
- Misses        568      577       +9     

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