tools/eshell: bugfix + minor refactor

+ Change default name for (doom) eshell buffers
+ Fix eshell splitting commands (referring to incorrect subcommand)
+ Correct aliases (using wrong commands)
+ +eshell/run => +eshell/open
+ +eshell/popup => +eshell/open-popup
+ +eshell/tab => +eshell/open-workspace
+ +eshell/prompt => +eshell-prompt (conform to naming convention)

modules/tools/eshell/autoload/evil.el

@@ -6,5 +6,5 @@
   (interactive "<fsh><!>")
   (if bang
       (+eshell/run)
-    (+eshell/popup)))
+    (+eshell/open-popup)))