`trim-kotlin-indent` function also applies to Schema annotation

[e-build]

Is your feature request related to a problem? Please describe.
I added the trim-kotlin-indent feature in the last PR. Mainly, we added logic to remove Kotlin indents for strings in the Operation annotation properties. After checking the issues that arose, I found that I wanted to apply the @Schema annotation as well (PR), so I'm going to work on it.

Describe the solution you'd like
I will also add logic to remove indentation for property values ​​of @Schema

[GeorgEchterling]

I've previously implemented this as a GlobalOpenApiCustomizer:

@Configuration
class OpenApiConfig {
    /**
     * Customizes the OpenAPI specification that was generated from Swagger annotations.
     * @see formatAllTexts
     * @see reorderAllFields
     */
    @Bean
    fun openApiCustomizer() = GlobalOpenApiCustomizer { openapi ->
        formatAllTexts(openapi)
        reorderAllFields(openapi)
    }

    /**
     * Trims Kotlin's indent on relevant specification fields, since trimIndent cannot be used directly in annotations.
     * This way, we can comfortably use multiline strings in annotations without
     * either formatting errors or having to start at column 1.
     */
    private fun formatAllTexts(openapi: OpenAPI) {
        openapi.components?.schemas?.values?.forEach(this::formatSchema)
        openapi.paths?.values?.forEach { path ->
            path.description = path.description?.trimIndent()
            path.readOperations()?.forEach(this::formatOperation)
        }
        openapi.components?.securitySchemes?.values?.forEach { securityScheme ->
            // @SecurityScheme.descriptions
            securityScheme.description = securityScheme.description?.trimIndent()
        }
        openapi.tags?.forEach { tag ->
            // @Tag.description
            tag.description = tag.description?.trimIndent()
        }
    }

    /**
     * Recursively formats the [schema]'s descriptions and examples.
     */
    private fun formatSchema(schema: Schema<*>) {
        // @Schema.description
        schema.description = schema.description?.trimIndent()

        // @Schema.example
        val example: Any? = schema.example
        if (example is String) schema.example = example.trimIndent()

        // Properties on classes
        schema.properties?.values?.forEach(this::formatSchema)

        // @ArraySchema.schema
        schema.items?.apply(this::formatSchema)
    }

    /**
     * Formats the [operation]'s descriptions.
     */
    private fun formatOperation(operation: Operation) {
        // @Operation.description
        operation.description = operation.description?.trimIndent()
        operation.responses?.values?.forEach { response ->
            // @ApiResponse.description
            response.description = response.description?.trimIndent()
        }
    }

    /**
     * Puts any inconsistently ordered fields in the generated OpenAPI specification into a consistent order.
     */
    private fun reorderAllFields(openapi: OpenAPI) {
        openapi.paths?.values?.forEach { path ->
            path.description = path.description?.trimIndent()
            path.readOperations()?.forEach(this::reorderApiResponses)
        }
    }

    /**
     * Reorders the [operation]'s API responses by status code.
     * The original generated responses were ordered arbitrarily and may change on any restart.
     */
    private fun reorderApiResponses(operation: Operation) {
        val originalResponses = operation.responses ?: return

        val reorderedResponses = ApiResponses()
        for ((name, item) in originalResponses.toSortedMap()) {
            reorderedResponses[name] = item
        }

        reorderedResponses.extensions = originalResponses.extensions

        operation.responses = reorderedResponses
    }
}

[e-build]

@GeorgEchterling
I already know that trim-kotlin-indent can be implemented using GlobalOpenApiCustomizer. I also personally solved the problem by implementing GlobalOpenApiCustomizer. However, I thought that all users using Kotlin would experience the same problem and feel the same inconvenience every time, so I added the function.