Open Lunar's launcher normally, then disable exit to dock and close it, ensure it's not running in the background, if it is you'll want to kill it.
Windows: Open Lunar Launcher Inject
Launch!
Unix: Set your current directory to the directory with Lunar Launcher Inject, then run chmod +x nameoflliexecutable (Please note, Mac users will have to rename the executable in order to remove all dots otherwise it will not work.)
Create the folder .weave and inside mods in your user profile path, to do this run: mkdir -p ~/.weave/mods
Add your mods to the folder and then run the .sh script.
Installion Method for Weave Manager
Weave Manager Electron
Note: Weave Manager Electron is very buggy and I don't recommend it as it usually fails to relaunch and uses excess amounts of resources. You should use Weave Loader instead.
Unix: ~/.weave/mods, create it if it does not exist.
Windows: Press Windows + R, then in the run dialogue type %userprofile, look for .weave, if it doesn't exist create it and inside make a folder called mods, the full path is %userprofile%/.weave/mods
Run it and launch lunar then hit relaunch with Weave.
Open CMD and change your current directory to the folder containing index.html and whatnot, to do this run cd PATH, PATH being the path to the folder.
Run npm i, and then npm run tauri build
Grab some water and develop patience.
Once your build is finished, you may get an error about keys, ignore it.
Navigate to src-tauri\target\release and Weave Manager.exe is it!
I have found Weave Manager Tauri to be very reliable and easy to use, minus the build tax.
Usage:
Add your mods to %userprofile%/.weave/mods
Launch Lunar
Hit relaunch
Inquire Candice about using the beta branch if you wish to use it. The best place to do this would be in the help channel. I personally have not tried the beta branch.