Added the Float type and many fixes. (0.24.0)

examples/floats.fun

@@ -0,0 +1,78 @@
+#!/usr/bin/env fun
+
+/*
+ * This file is part of the Fun programming language.
+ * https://hanez.org/project/fun/
+ *
+ * Copyright 2025 Johannes Findeisen <you@hanez.org>
+ * Licensed under the terms of the Apache-2.0 license.
+ * https://opensource.org/license/apache-2-0
+ *
+ * Added: 2025-10-04
+ */
+
+// Float type demonstration Literals: decimal and scientific notation
+float a = 1.23
+float b = 4.0
+float c = 1e2
+float d = 5E-1
+
+// Arithmetic with promotion
+float s1 = a + b       // 1.23 + 4.0 = 5.23
+float s2 = c - 50      // 100.0 - 50 -> 50.0
+float p  = 2 * d       // 2 * 0.5 -> 1.0
+number q  = 7 / 2      // int division -> 3
+float r  = 7 / 2.0     // float division -> 3.5
+
+print("a=" + to_string(a))
+print("a: " + typeof(a))
+print("b=" + to_string(b))
+print(typeof(b))
+print("c=" + to_string(c))
+print(typeof(c))
+print("d=" + to_string(d))
+print(typeof(d))
+print("s1=" + to_string(s1))
+print(typeof(s1))
+print("s2=" + to_string(s2))
+print(typeof(s2))
+print("p=" + to_string(p))
+print(typeof(p))
+print("q=" + to_string(q))
+print(typeof(q))
+print("r=" + to_string(r))
+print(typeof(r))
+
+// to_number behavior
+string s = "42.0"
+number t = to_number(s)   // preserves int when exact -> 42
+print("to_number(\"42.0\")=" + to_string(t))
+print(typeof(t))
+float u = to_number("3.14")
+print("to_number(\"3.14\")=" + to_string(u))
+print(typeof(u))
+
+/* Expected output:
+a=1.23
+Float
+b=4
+Float
+c=100
+Float
+d=0.5
+Float
+s1=5.2300000000000004
+Float
+s2=50
+Float
+p=1
+Float
+q=3
+Number
+r=3.5
+Float
+to_number("42.0")=42
+Number
+to_number("3.14")=3.1400000000000001
+Float
+*/