deleta some default keymap of flash.nvim in LazyVim

lua/config/options.lua

@@ -1,3 +1,18 @@
 -- Options are automatically loaded before lazy.nvim startup
 -- Default options that are always set: https://github.com/LazyVim/LazyVim/blob/main/lua/lazyvim/config/options.lua
 -- Add any additional options here
+
+if vim.loop.os_uname().sysname == "Windows_NT" then -- set default shell to powershell on Windows
+    vim.opt.shell = "powershell.exe"
+    vim.opt.shellcmdflag = "-Command"
+    vim.opt.shellquote = ""
+    vim.opt.shellxquote = ""
+    vim.opt.shellredir = "2>&1 | Out-File -Encoding ASCII %s; exit $LastExitCode"
+    vim.opt.shellpipe = "2>&1 | Out-File -Encoding ASCII %s; exit $LastExitCode"
+end
+
+-- Tab
+vim.opt.tabstop = 4                 -- number of visual spaces per TAB
+vim.opt.softtabstop = 4             -- number of spacesin tab when editing
+vim.opt.shiftwidth = 4              -- insert 4 spaces on a tab
+vim.opt.expandtab = true            -- tabs are spaces, mainly because of python