update: nvim: split pwsh config as a module

dotfiles/neovim/lua/term_powershell.lua

@@ -0,0 +1,37 @@
+-- use PowerShell on Windows
+-- original code from :h powershell
+
+local M = {}
+
+---@class TermPwshConfig
+---@field pwsh? boolean Whether to use pwsh instead of windows powershell.
+
+---Entry.
+---@param option TermPwshConfig
+M.setup = function(option)
+    if vim.fn.has('win32') == 1 then
+        option = option or {}
+        if option.pwsh then
+            vim.opt.shell = 'pwsh'
+        else
+            -- this evaluation is so slow
+            -- vim script func returns 1/0, while lua evals false only if gets false or nil
+            -- so be sure to compare with 1/0
+            if vim.fn.executable('pwsh') == 1 then
+                vim.opt.shell = 'powershell'
+            else
+                vim.opt.shell = 'pwsh'
+            end
+        end
+        -- adding option to disable colored output
+        -- (ref: https://stackoverflow.com/questions/65735639/powershell-disable-colored-command-output)
+        vim.opt.shellcmdflag =
+        '-NoLogo -NoProfile -ExecutionPolicy RemoteSigned -Command [Console]::InputEncoding=[Console]::OutputEncoding=[System.Text.Encoding]::UTF8;$PSStyle.OutputRendering=[System.Management.Automation.OutputRendering]::PlainText;'
+        vim.opt.shellredir = '-RedirectStandardOutput %s -NoNewWindow -Wait'
+        vim.opt.shellpipe = '2>&1 | Out-File -Encoding UTF8 %s; exit $LastExitCode'
+        vim.opt.shellquote = ''
+        vim.opt.shellxquote = ''
+    end
+end
+
+return M