Send the pack before join, PackSquash, merge other packs, and Velocity

Sending the pack

• New send: settings: before-join sends the pack while the player is still connecting (Paper 1.21.7+), so they arrive with it loaded. on-join and on-reload turn the automatic sends off, and delay waits a number of ticks after joining.
• prompt.message now takes MiniMessage (colours, hex, bold, gradients, rainbow) and & codes.

Smaller packs

• New pack.packsquash: put PackSquash in plugins/RPEngine/packsquash/ and every pack is squashed before it is sent. Its default settings keep HUD, dialog and 3D armour textures exact, and a pack is only squashed again when it changes.

Other plugins' packs

• New pack.merge: list other plugins' resource packs (a folder or a zip) and they are built into RP Engine's, so players download one pack. Your own content wins where both ship the same file.

Networks

• New proxy.enabled, for RPE Proxy, our new Velocity plugin: players are sent the pack once when they join the network, switching servers sends nothing, and the proxy can serve the pack from its own port. See Velocity (RPE Proxy).

0.2.61: Textures with capital letters in their names work

• Fixed item icons drawing as the purple and black missing texture when their file had a capital letter in its name (Aal.png). Minecraft refuses capital letters in any resource pack path, and the file was copied into the pack as it was. The built pack now lowercases those files and everything that names them, and the console says which files to rename.