Add more linters to improve code readability (#19989)

Add nakedret, unconvert, wastedassign, stylecheck and nolintlint linters to improve code readability

- nakedret - https://github.com/alexkohler/nakedret - nakedret is a Go static analysis tool to find naked returns in functions greater than a specified function length.
- unconvert - https://github.com/mdempsky/unconvert - Remove unnecessary type conversions
- wastedassign - https://github.com/sanposhiho/wastedassign -  wastedassign finds wasted assignment statements.
- notlintlint -  Reports ill-formed or insufficient nolint directives
- stylecheck - https://staticcheck.io/docs/checks/#ST - keep style consistent
  - excluded: [ST1003 - Poorly chosen identifier](https://staticcheck.io/docs/checks/#ST1003) and [ST1005 - Incorrectly formatted error string](https://staticcheck.io/docs/checks/#ST1005)

routers/web/user/setting/profile.go

@@ -347,7 +347,7 @@ func Repos(ctx *context.Context) {
 		ctx.Data["Repos"] = repos
 	}
 	ctx.Data["Owner"] = ctxUser
-	pager := context.NewPagination(int(count), opts.PageSize, opts.Page, 5)
+	pager := context.NewPagination(count, opts.PageSize, opts.Page, 5)
 	pager.SetDefaultParams(ctx)
 	ctx.Data["Page"] = pager
 	ctx.HTML(http.StatusOK, tplSettingsRepositories)