Refactor configuration management by migrating to a modular config system

- Removed the old `infra.Config` structure and replaced it with a new modular configuration system in `pkg/config`.
- Introduced a `Config` struct in `cmd/web/config.go` to hold command-specific configurations.
- Updated configuration loading functions to utilize the new `LoadConfig` method with generics for type safety.
- Adjusted various initialization functions in `cmd/web/bootstrap.go` and `cmd/web/main.go` to reflect the new configuration structure.
- Cleaned up the `config.yaml` by removing obsolete fields and ensuring it aligns with the new configuration schema.

cmd/web/config.go

@@ -0,0 +1,27 @@
+package main
+
+import (
+	"tm/pkg/config"
+)
+
+// Config holds configuration for the web command
+type Config struct {
+	Server       config.ServerConfig    `mapstructure:"server"`
+	Database     config.DatabaseConfig  `mapstructure:"database"`
+	Cache        config.CacheConfig     `mapstructure:"cache"`
+	Logging      config.LoggingConfig   `mapstructure:"logging"`
+	RateLimit    config.RateLimitConfig `mapstructure:"rate_limiting"`
+	UserAuth     AuthConfig             `mapstructure:"user_authorization"`
+	CustomerAuth AuthConfig             `mapstructure:"customer_authorization"`
+}
+
+type AuthConfig struct {
+	JWT JWTConfig `mapstructure:"jwt"`
+}
+
+type JWTConfig struct {
+	AccessSecret     string `mapstructure:"access_secret"`
+	RefreshSecret    string `mapstructure:"refresh_secret"`
+	AccessExpiresIn  int    `mapstructure:"access_expires_in"`
+	RefreshExpiresIn int    `mapstructure:"refresh_expires_in"`
+}