Changed the polearm HP multiplier settings to use floating values.

Polearms now have a base HP of 500.

Higher relative movement speed no longer deals additional damage to polearms (damage to polearms is now calculated from both damage inflicted and damage absorbed by armor).
Polearms' hit points are now calculated based on their handling using a logarithmic scale instead of a linear scale.
Fixed a bug where a polearm's hit points could decrease if its usage was changed.
Refactored the code.

Fixed a bug where a polearm's hit points percentage could be higher than 100%.

Fixed a bug where the HP of polearms could increase.
Greatly decreased the damage dealt to polearms when hitting a shield or entity.

Improved localization slightly.

Added a MCM setting to deal damage to polearms above a minimum length.
Removed the Japanese localization.

Fixed a bug where polearms did not break if the multiplier for damage to polearms was less than 1.
Updated for UIExtenderEx 2.9.

Updated for Bannerlord 1.2.7.

Minor changes.