Multiple clientside-mods additions

added 3 commits

• bcd5cdb1 - fix: Allow default value in pref-store get
• 2162d552 - chore: Clientside-mod stuff
• 69aa702c - chore: Dep updates in license agreement

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added 1 commit

• 3fda087f - chore: Add ftbpromoter to list of clientside-mods. Thanks to @ModernGamingWorld for the report!

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added 1 commit

• dddde838 - build: Update siouan-frontend-gradle-plugin and NodeJS version, fix building on macOS

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mentioned in commit 5e13da4f

merged