Feature - Pagination for git tree API (#5838)

* Feature - Pagination for git tree API

* Handles case when page is negative

* Does a for loop over the start and end rather than all entries

* Removed redundent logic

* Adds per_page as a query parameter

* Adds DEFAULT_GIT_TREES_PER_PAGE for settings, ran make fmt

* Fix typo in cheat-sheet en

* Makes page start at 1, generated swagger

* Use updates to SDK

* Updates to use latest sdk

* Updates swagger for tree api

* Adds test for GetTreeBySHA

* Updates per PR reviews

* Updates per PR reviews

* Remove file

* Formatting

* Fix to swagger file

* Fix to swagger

* Update v1_json.tmpl

* Fix to swagger file

modules/setting/setting.go

@@ -561,13 +561,15 @@ var (
 
 	// API settings
 	API = struct {
-		EnableSwagger    bool
-		MaxResponseItems int
-		DefaultPagingNum int
+		EnableSwagger          bool
+		MaxResponseItems       int
+		DefaultPagingNum       int
+		DefaultGitTreesPerPage int
 	}{
-		EnableSwagger:    true,
-		MaxResponseItems: 50,
-		DefaultPagingNum: 30,
+		EnableSwagger:          true,
+		MaxResponseItems:       50,
+		DefaultPagingNum:       30,
+		DefaultGitTreesPerPage: 1000,
 	}
 
 	U2F = struct {