Disable ktlint_standard_backing-property-naming rule in .editorconfig and remove related suppressions in codebase

Author: devcrocod

.editorconfig

@@ -30,6 +30,7 @@ ktlint_class_signature_rule_force_multiline_when_parameter_count_greater_or_equa
 ktlint_function_signature_rule_force_multiline_when_parameter_count_greater_or_equal_than = 4
 ktlint_standard_chain-method-continuation = disabled
 ktlint_ignore_back_ticked_identifier = true
+ktlint_standard_backing-property-naming = disabled
 ktlint_standard_multiline-expression-wrapping = disabled
 ktlint_standard_when-entry-bracing = disabled
 

kotlin-sdk-server/src/commonMain/kotlin/io/modelcontextprotocol/kotlin/sdk/server/Server.kt

@@ -95,13 +95,10 @@ public open class Server(
         block: Server.() -> Unit = {},
     ) : this(serverInfo, options, { instructions }, block)
 
-    @Suppress("ktlint:standard:backing-property-naming") // TODO
     private var _onInitialized: (() -> Unit) = {}
 
-    @Suppress("ktlint:standard:backing-property-naming")
     private var _onConnect: (() -> Unit) = {}
 
-    @Suppress("ktlint:standard:backing-property-naming")
     private var _onClose: () -> Unit = {}
 
     @OptIn(ExperimentalTime::class)

kotlin-sdk-server/src/commonMain/kotlin/io/modelcontextprotocol/kotlin/sdk/server/ServerSession.kt

@@ -52,10 +52,8 @@ public open class ServerSession(
     @OptIn(ExperimentalUuidApi::class)
     public val sessionId: String = Uuid.random().toString()
 
-    @Suppress("ktlint:standard:backing-property-naming")
     private var _onInitialized: (() -> Unit) = {}
 
-    @Suppress("ktlint:standard:backing-property-naming")
     private var _onClose: () -> Unit = {}
 
     /**