repl: Add a few new quality of life improvements (#2030)

- You can define a `startup.gc` in your user folder, each line will be
executed on startup (deprecates the usefulness of some cli flags)
- You can define a `repl-config.json` file to override REPL settings.
Long-term this is a better approach than a bunch of CLI flags as well
- Via this, you can override the amount of time the repl will attempt to
listen for the target
- At the same time, I think i may have found why on Windows it can
sometimes take forever to timeout when the game dies, will dig into this
later
- Added some keybinds for common operations, shown here


https://user-images.githubusercontent.com/13153231/202890278-1ff2bb06-dddf-4bde-9178-aa0883799167.mp4
> builds the game, connects to it, attaches a debugger and continues,
launches it, gets the backtrace, stops the target -- all with only
keybinds.

If you want these keybinds to work inside VSCode's integrated terminal,
you need to add the following to your settings file
```json
"terminal.integrated.commandsToSkipShell": [
    "-workbench.action.quickOpen",
    "-workbench.action.quickOpenView"
  ]
```

Taskfile.yml

@@ -67,10 +67,10 @@ tasks:
       - sh: test -f {{.GOALC_BIN_RELEASE_DIR}}/goalc{{.EXE_FILE_EXTENSION}}
         msg: "Couldn't locate compiler executable in '{{.GOALC_BIN_RELEASE_DIR}}/goalc'"
     cmds:
-      - "{{.GOALC_BIN_RELEASE_DIR}}/goalc --game {{.GAME}}"
+      - "{{.GOALC_BIN_RELEASE_DIR}}/goalc --user-auto --game {{.GAME}}"
   repl-lt:
     cmds:
-      - "{{.GOALC_BIN_RELEASE_DIR}}/goalc --auto-lt --game {{.GAME}}"
+      - "{{.GOALC_BIN_RELEASE_DIR}}/goalc --auto-lt --user-auto --game {{.GAME}}"
   format:
     desc: "Format code"
     cmds: