Addon development reload

[yofukashino]

Describe the bug

When building /watching an addon and the addon isn't already installed it still tries to reload the addon instead of loading missing addon and then enable it.
It should check if it exist then reload else load and start

Reproduction steps

1. Get a new addon you don't have installed
2. Watch/build the addon while discord with replugged is open
3. It gives error that it can't reload the addon

Expected behavior

Load missing addon and enable it

Actual behavior

Tries to reload without loading it first

Additional information

No response

Please confirm the following

• I checked if Discord and Replugged are up to date
• I made sure this is not related to an external plugin or a theme
• I searched the issues to make sure this bug has not been reported before.