I haven't seen anything like that previously, but making a Lackey plugin of it sounds like a good idea!
Having a server (and an updatelist.txt and version.txt) are super handy for easy installation, as well as keeping everyone up-to-date if/when you add new cards, but they are not necessary for a plugin to function. For instance, assuming you have the stock Magic plugin installed, look in your [LackeyCCG]/plugins folder. The folder there named "magic" contains your local copy of the plugin (downloaded from the server). If you copy that whole folder to another computer's installation of Lackey, it will work just fine, with no downloading from the server necessary. (A sort-of exception is images, since usually those are downloaded on the fly, but if all images are present, this holds true for them too.) Once you've built it as a static plugin and verified that it works, you can always add auto-update later if you choose to.
Card data list files are just tab-separated text files, which (often with some fiddling) can be exported from Excel or other spreadsheet software. I'd recommend reading the plugin creation tutorial, taking a look at how the existing Magic plugin does things, and going from there, checking back here with questions as needed.
Having a server (and an updatelist.txt and version.txt) are super handy for easy installation, as well as keeping everyone up-to-date if/when you add new cards, but they are not necessary for a plugin to function. For instance, assuming you have the stock Magic plugin installed, look in your [LackeyCCG]/plugins folder. The folder there named "magic" contains your local copy of the plugin (downloaded from the server). If you copy that whole folder to another computer's installation of Lackey, it will work just fine, with no downloading from the server necessary. (A sort-of exception is images, since usually those are downloaded on the fly, but if all images are present, this holds true for them too.) Once you've built it as a static plugin and verified that it works, you can always add auto-update later if you choose to.
Card data list files are just tab-separated text files, which (often with some fiddling) can be exported from Excel or other spreadsheet software. I'd recommend reading the plugin creation tutorial, taking a look at how the existing Magic plugin does things, and going from there, checking back here with questions as needed.