[WIP] start 1.15 port

reorganize packages to match Fabric version
use util classes from Fabric version

src/main/kotlin/mods/betterfoliage/util/Gui.kt

@@ -0,0 +1,22 @@
+@file:JvmName("Utils")
+package mods.betterfoliage.util
+
+import net.minecraft.util.text.StringTextComponent
+import net.minecraft.util.text.Style
+import net.minecraft.util.text.TextFormatting
+import net.minecraft.util.text.TextFormatting.AQUA
+import net.minecraft.util.text.TextFormatting.GRAY
+
+fun stripTooltipDefaultText(tooltip: MutableList<String>) {
+    var defaultRows = false
+    val iter = tooltip.iterator()
+    while (iter.hasNext()) {
+        if (iter.next().startsWith(AQUA.toString())) defaultRows = true
+        if (defaultRows) iter.remove()
+    }
+}
+
+fun textComponent(msg: String, color: TextFormatting = GRAY): StringTextComponent {
+    val style = Style().apply { this.color = color }
+    return StringTextComponent(msg).apply { this.style = style }
+}