Update to 26.3

[robotum1]

Updates mc-update from 26.3-pre-1 to the 26.3 release.

Changes

• Minecraft 26.3, Fabric Loader 0.19.5, Fabric API 0.161.0+26.3
• Bump the compile-only compat dependencies (Sodium, Lithium, Iris, ModMenu) to their 26.3 builds
• Util.getPlatform().openUri(String) was removed in 26.3; its call sites now use Blaze3D.openUri(URI.create(...))
• ClientLevel#addBreakingBlockEffect was split into addBreakingBlockEffects, addBreakingParticles and playBreakingSound. NoRender's block particle hook now targets addBreakingParticles, so the breaking sound still plays
• Fix a crash in ScreenMixin#onKeyPressed when a key is pressed while the game is starting. 26.3 pumps input events from the Minecraft constructor, before Meteor has initialized
• Fix typing in text boxes. SDL only delivers typed characters while text input is enabled, which vanilla does from EditBox#setFocused; WTextBox now does the same
• Fix migrating keybinds saved in the legacy format. They store raw GLFW key codes, which were being loaded as SDL codes (e.g. the grave accent key became keypad 8), so they're now translated through the key names
• Fix a crash when hovering items that have a Meteor tooltip (e.g. Better Tooltips' ender chest and shulker previews) in container screens. 26.3 container screens use the Component list overload of setTooltipForNextFrame, which the mixin didn't cover, so MeteorTooltipData went through ClientTooltipComponent.create() and added a null line
• Entity shaders (ESP/Chams) no longer call LevelRenderer#executeOutline, and run the same outline pass directly instead. Other mods inject into executeOutline expecting it to only run inside the main pass; Litematica draws schematics there and crashed with "Cannot dereference handle with no underlying resource" as soon as ESP drew an entity

Testing

• Checked every mixin target against the 26.3 jars, including the compat mixins for Sodium, Lithium, Iris, Indigo, ViaFabricPlus and Baritone, plus the class tweaker entries
• Launched into a singleplayer world on 26.3 with Sodium, Lithium, Iris, Litematica and Baritone (from 26.3 baritone#16)

Notes

• baritone is still 26.1-SNAPSHOT, since there's no 26.3 build on the Meteor maven yet (see 26.3 baritone#16)
• URI.create throws on a malformed URL, where the old openUri(String) only logged it. This only matters for URLs that come from addons (the website button in the commits screen)
• I also have master merged into mc-update with the conflicts resolved (mostly from the GLFW to InputConstants migration), and can open that as a separate PR if it's useful