Move plugin loading to the top of the rendered ~/.config/hypr/hyprland.lua as plugins must be loaded before hl.config can be called with config keys added by the plugin, (binds using dispatchers added by plugins also fail if they are defined before the plugin is loaded)
This also switches over to using the (undocumented?) hl.plugin.load("/path/to/plugin.so") to load plugins, which has solved some strange race condition weirdness caused by using exec_cmd with hyprctl plugin load (I first tried moving renderStartHook to the top of the rendered config, but sometimes it seemed the hyprctl plugin load wouldn't finish loading the plugin before the rest of the config was loaded, causing the same errors about unknown config keys)
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