feat: 送信したフォローリクエストを確認できるように (#14856)

* FEAT: Allow users to view pending follow requests they sent

This commit implements the `following/requests/sent` interface firstly
implemented on Firefish, and provides a UI interface to view the pending
follow requests users sent.

* ux: should not show follow requests tab when have no pending sent follow req

* fix default followreq tab

* fix default followreq tab

* restore missing hasPendingReceivedFollowRequest in navbar

* refactor

* use tabler icons

* tweak design

* Revert "ux: should not show follow requests tab when have no pending sent follow req"

This reverts commit e580b92c37.

* Update Changelog

* Update Changelog

* change tab titles

---------

Co-authored-by: Lhc_fl <lhcfl@outlook.com>
Co-authored-by: Hazelnoot <acomputerdog@gmail.com>

packages/misskey-js/etc/misskey-js.api.md

@@ -1504,6 +1504,8 @@ declare namespace entities {
         FollowingRequestsCancelResponse,
         FollowingRequestsListRequest,
         FollowingRequestsListResponse,
+        FollowingRequestsSentRequest,
+        FollowingRequestsSentResponse,
         FollowingRequestsRejectRequest,
         GalleryFeaturedRequest,
         GalleryFeaturedResponse,
@@ -2018,6 +2020,12 @@ type FollowingRequestsListResponse = operations['following___requests___list']['
 // @public (undocumented)
 type FollowingRequestsRejectRequest = operations['following___requests___reject']['requestBody']['content']['application/json'];
 
+// @public (undocumented)
+type FollowingRequestsSentRequest = operations['following___requests___sent']['requestBody']['content']['application/json'];
+
+// @public (undocumented)
+type FollowingRequestsSentResponse = operations['following___requests___sent']['responses']['200']['content']['application/json'];
+
 // @public (undocumented)
 type FollowingUpdateAllRequest = operations['following___update-all']['requestBody']['content']['application/json'];