[Feature] Add devcontainer support (#4294)

* Add devcontainer support

* Rename default values for eqemu_config

* Move devcontainer files to devcontainer

.devcontainer/base/login.json

@@ -0,0 +1,37 @@
+{
+	"database": {
+		"host": "127.0.0.1",
+		"port": "3306",
+		"db": "peq",
+		"user": "peq",
+		"password": "peqpass"
+	},
+	"account": {
+		"auto_create_accounts": true
+	},
+	"worldservers": {
+		"unregistered_allowed": true,
+		"reject_duplicate_servers": false
+	},
+	"web_api": {
+		"enabled": true,
+		"port": 6000
+	},
+	"security": {
+		"mode": 14,
+		"allow_password_login": true,
+		"allow_token_login": true
+	},
+	"logging": {
+		"trace": false,
+		"world_trace": false,
+		"dump_packets_in": false,
+		"dump_packets_out": false
+	},
+	"client_configuration": {
+		"titanium_port": 5998,
+		"titanium_opcodes": "assets/patches/login_opcodes.conf",
+		"sod_port": 5999,
+		"sod_opcodes": "assets/patches/login_opcodes_sod.conf"
+	}
+}