fix: error on windows with no battery (#51)

* feat(parsers): move all parsers to their own submodule (#43)

BREAKING CHANGE: Parser modules have been moved

Add `check` functions to all parser modules

* fix: Termux compatible `is_readable_directory` function (#42)

* feat(util): use test command to check directory

* fix: use single quotes in util/file.lua

* feat(util): add type hints and documentation, remove old function

* feat(parsers): move all parsers to their own submodule (#43)

BREAKING CHANGE: Parser modules have been moved

Add `check` functions to all parser modules

* feat(util): use old "readable directory" method when not in Termux

* docs: start adding type definitions

* docs: consistent doc-comment

* fix(parsers/powershell): default to 2 when no batteries

lua/battery/parsers/powershell.lua

@@ -56,7 +56,10 @@ local function parse_powershell_battery_info(result, battery_status)
 
   -- only the first battery is used to determine charging or not
   -- since they should all be the same
-  local status = batteries[1]['BatteryStatus']
+  local status = (
+    batteries[1] and batteries[1]['BatteryStatus'] -- Get BatteryStatus if present
+    or 2 -- Default to 2 ("AC Power")
+  )
   local ac_power = status_code_to_ac_power[status]
 
   if count > 0 then