feat(buffer): add ability for close_tab to close a specific tabpage

Co-authored-by: Lou Greenwood <lougreenwood@me.com>

lua/astrocore/buffer.lua

@@ -122,7 +122,7 @@ function M.prev()
 end
 
 --- Close a given buffer
----@param bufnr? number The buffer to close or the current buffer if not provided
+---@param bufnr? integer The buffer to close or the current buffer if not provided
 ---@param force? boolean Whether or not to foce close the buffers or confirm changes (default: false)
 function M.close(bufnr, force)
   if not bufnr or bufnr == 0 then bufnr = vim.api.nvim_get_current_buf() end
@@ -197,12 +197,14 @@ function M.sort(compare_func, skip_autocmd)
   return false
 end
 
---- Close the current tab
-function M.close_tab()
+--- Close a given tab
+---@param tabpage? integer The tabpage to close or the current tab if not provided
+function M.close_tab(tabpage)
   if #vim.api.nvim_list_tabpages() > 1 then
-    vim.t.bufs = nil
+    tabpage = tabpage or vim.api.nvim_get_current_tabpage()
+    vim.t[tabpage].bufs = nil
     astro.event "BufsUpdated"
-    vim.cmd.tabclose()
+    vim.cmd.tabclose(vim.api.nvim_tabpage_get_number(tabpage))
   end
 end