feat(player-stats): add configurable stamina and strength modifiers by gender

[AlexRXWindy]

Description

This PR adds the ability for server owners to configure different stamina and strength multipliers based on player gender/sex. The feature integrates seamlessly into the existing adjustments system and provides flexible configuration options for roleplay servers.

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Implementation Details

Added new configuration option Config.PlayerStatsByGender in adjustments config
Implements gender detection through two methods:

Character data from database (ESX.PlayerData.sex)
Visual ped model detection (freemode models)

Uses native multipliers for real-time gameplay effects:

SetRunSprintMultiplierForPlayer() for sprint speed
SetSwimMultiplierForPlayer() for swim speed
SetPlayerMeleeWeaponDamageModifier() for melee damage
SetPedMoveRateOverride() for movement speed

Listens to ESX events for automatic stat updates:

esx:playerLoaded - Initial application
skinchanger:modelLoaded - On skin change
esx:onPlayerSpawn - On respawn

No server-side code required, uses only ESX.PlayerData

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Usage Example

-- In shared/config/adjustments.lua
Config.PlayerStatsByGender = {
    enabled = true,                    -- Enable/disable the feature
    useCharacterData = true,            -- true: uses ESX.PlayerData.sex | false: uses ped model/skin
    debugMode = false,                  -- Enable debug prints for testing
    male = {
        stamina = 1.0,                  -- Default multiplier (no change)
        strength = 1.0                  -- Default multiplier (no change)
    },
    female = {
        stamina = 1.15,                 -- 15% more stamina/speed
        strength = 0.85                 -- 15% less melee damage
    }
}

-- Feature is automatically applied when player loads
-- No additional setup required