[DOCS] Descriptions for the count API (#2265)

Author: abdonpijpelink

output/schema/schema.json

@@ -30,25 +30,91 @@ import { Operator } from '@_types/query_dsl/Operator'
  */
 export interface Request extends RequestBase {
   path_parts: {
+    /**
+     * Comma-separated list of data streams, indices, and aliases to search.
+     * Supports wildcards (`*`).
+     * To search all data streams and indices, omit this parameter or use `*` or `_all`.
+     */
     index?: Indices
   }
   query_parameters: {
+    /**
+     * If `false`, the request returns an error if any wildcard expression, index alias, or `_all` value targets only missing or closed indices.
+     * This behavior applies even if the request targets other open indices.
+     * @server_default true
+     */
     allow_no_indices?: boolean
+    /**
+     * Analyzer to use for the query string.
+     * This parameter can only be used when the `q` query string parameter is specified.
+     */
     analyzer?: string
+    /**
+     * If `true`, wildcard and prefix queries are analyzed.
+     * This parameter can only be used when the `q` query string parameter is specified.
+     * @server_default false
+     */
     analyze_wildcard?: boolean
+    /**
+     * The default operator for query string query: `AND` or `OR`.
+     * This parameter can only be used when the `q` query string parameter is specified.
+     */
     default_operator?: Operator
+    /**
+     * Field to use as default where no field prefix is given in the query string.
+     * This parameter can only be used when the `q` query string parameter is specified.
+     */
     df?: string
+    /**
+     * Type of index that wildcard patterns can match.
+     * If the request can target data streams, this argument determines whether wildcard expressions match hidden data streams.
+     * Supports comma-separated values, such as `open,hidden`.
+     * @server_default open
+     */
     expand_wildcards?: ExpandWildcards
+    /**
+     * If `true`, concrete, expanded or aliased indices are ignored when frozen.
+     * @server_default true
+     */
     ignore_throttled?: boolean
+    /**
+     * If `false`, the request returns an error if it targets a missing or closed index.
+     * @server_default false
+     */
     ignore_unavailable?: boolean
+    /**
+     * If `true`, format-based query failures (such as providing text to a numeric field) in the query string will be ignored.
+     * @server_default false
+     */
     lenient?: boolean
+    /**
+     * Sets the minimum `_score` value that documents must have to be included in the result.
+     */
     min_score?: double
+    /**
+     * Specifies the node or shard the operation should be performed on.
+     * Random by default.
+     */
     preference?: string
+    /**
+     * Custom value used to route operations to a specific shard.
+     */
     routing?: Routing
+    /**
+     * Maximum number of documents to collect for each shard.
+     * If a query reaches this limit, Elasticsearch terminates the query early.
+     * Elasticsearch collects documents before sorting.
+     */
     terminate_after?: long
+    /**
+     * Query in the Lucene query string syntax.
+     */
     q?: string
   }
   body: {
+    /**
+     * Defines the search definition using the Query DSL.
+     */
     query?: QueryContainer
   }
 }