Update batch scripts

build.bat

@@ -1,3 +1,5 @@
 @echo off
 cls
-%CD%/env/scripts/pyinstaller build.spec
+set dirpath=%~dp0
+if "%dirpath:~-1%" == "\" set dirpath=%dirpath:~0,-1%
+"%dirpath%/env/scripts/pyinstaller" build.spec

run_dev.bat

@@ -0,0 +1,11 @@
+@echo off
+cls
+set dirpath=%~dp0
+if "%dirpath:~-1%" == "\" set dirpath=%dirpath:~0,-1%
+set /p "choice=Start with a console? (y/n) "
+if "%choice%"=="y" (
+    set "exepath=%dirpath%\env\scripts\python"
+) else (
+    set "exepath=%dirpath%\env\scripts\pythonw"
+)
+start "TwitchDropsMiner" "%exepath%" "%dirpath%\main.py"