Clarify parameter interaction in searchContent method (#346)

- offset parameter will only be interpreted by Mastodon server if a type is specified; if not, default value of 0 will always be used by server
- this behaviour is currently not documented by Mastodon, see issue: mastodon/documentation#1336

Closes #342.

bigbone/src/main/kotlin/social/bigbone/api/method/SearchMethods.kt

@@ -34,6 +34,7 @@ class SearchMethods(private val client: MastodonClient) {
 
  /**
  * Search for content in accounts, statuses and hashtags.
+ * @see <a href="https://github.com/mastodon/documentation/issues/1336">Mastodon issue: incomplete documentation of offset/type parameters</a>
  * @param query string to search for
  * @param type to specify if you are looking for a specific typology
  * @param resolve whether to resolve non-local accounts
@@ -43,7 +44,7 @@ class SearchMethods(private val client: MastodonClient) {
  * @param maxId to return results whose id will be lesser than this one
  * @param minId to return results whose id will be newer than this one
  * @param limit to limit number of results within a range of 20-40 per category
- * @param offset to skip the first n results
+ * @param offset to skip the first n results; only used if a type is specified
  * @see <a href="https://docs.joinmastodon.org/methods/search/">Mastodon API documentation: methods/search</a>
  */
  @JvmOverloads