terminal: Create module to consolidate term utils

Terminal application, a variety of shell configurations, terminal file
and session management all consolidated in one place.

terminal/.config/wezterm/statusbar.lua

@@ -0,0 +1,46 @@
+local wezterm = require 'wezterm'
+
+local function basename(s) return string.gsub(s or '', '(.*[/\\])(.*)', '%2') end
+
+local SEPARATOR = ' | '
+local function setup()
+    -- STATUSBAR
+    -- show currently active key table in lower right status bar
+    -- mimicing Vim modes
+    wezterm.on('update-status', function(window, pane)
+        local displayed = { left = {}, right = {} }
+        local keytable = window:active_key_table()
+        if keytable then
+            displayed.left[#displayed.left + 1] = 'MODE: ' .. keytable
+        end
+
+        local workspace = window:active_workspace()
+        if workspace and workspace ~= 'default' then
+            displayed.left[#displayed.left + 1] = 'WORKSPACE: ' .. workspace
+        end
+
+        local bat = ''
+        for _, b in ipairs(wezterm.battery_info()) do
+            bat = '🔋 ' .. string.format('%.0f%%', b.state_of_charge * 100) ..
+                ' ' .. b.state
+        end
+        displayed.right[#displayed.right + 1] = bat
+
+        local currentprogram = pane:get_foreground_process_name()
+        displayed.right[#displayed.right + 1] = basename(currentprogram)
+
+        local statusleft = ''
+        for _, v in ipairs(displayed.left) do
+            statusleft = statusleft .. v .. SEPARATOR
+        end
+        local statusright = ''
+        for _, v in ipairs(displayed.right) do
+            statusright = statusright .. v .. SEPARATOR
+        end
+
+        window:set_left_status(statusleft or '')
+        window:set_right_status(statusright or '')
+    end)
+end
+
+return { setup = setup }