feat: add 17 non-crashing regression tests from wren-fuzz for issue #442

These test cases cover malformed class declarations, invalid string literals,
corrupted identifiers, and various edge cases that previously caused crashes
but now produce expected parse errors.

test/regression/442-000005.wren

@@ -0,0 +1,15 @@
+System.print("Held!")
+
+// expect error line 8
+class Wren {
+yTo(city) {
+System.print("Fl0to %(bity)")
+  }
+GGGGGGCGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGing GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG}
+
+vach GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG}
+
+vach {|word|èiberd(wryield(word) }
+}
+
+while (!ad

test/regression/442-000007.wren

@@ -0,0 +1,4 @@
+// expect error line 3
+// expect error line 4
+class 0""0
+class@0c""c00000000000000000000000000000000000000000000000000ëëëìëëëë

test/regression/442-000086.wren

@@ -0,0 +1,2 @@
+// expect error line 2
+class]e00000000000000000000000000000000000«««««««

test/regression/442-000088.wren

@@ -0,0 +1,2 @@
+// expect error line 2
+class]e00000000000000000000000000000000000«««««««

test/regression/442-000089.wren

@@ -0,0 +1,2 @@
+// expect error line 2
+class{M00000000000000000000000000000000000«««««««

test/regression/442-000100.wren

@@ -0,0 +1,2 @@
+// expect error line 2
+class W00000000000000000000000000000000000«««««««

test/regression/442-000115.wren

@@ -0,0 +1,6 @@
+// expect error line 4
+// expect error line 5
+// expect error line 6
+0.p(""0
+classý0p("".0
+0""class W00000000000000000000000000000000000«««««««

test/regression/442-000166.wren

@@ -0,0 +1,2 @@
+// expect error line 2
+class]e00000000000000000000000000000000000ÖÖÖÖÖÖÖ

test/regression/442-000181.wren

@@ -0,0 +1,3 @@
+// expect error line 2
+class 0.r«««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««0«0«0
+class W00000000000000000000000000000000000ÖÖÖÖÖÖÖ

test/regression/442-000182.wren

@@ -0,0 +1,5 @@
+// expect error line 3
+// expect error line 5
+em.0(0Hel00)
+
+class WVe00000000000000000000000000000000ÖÖÖÖÖÖÖ

test/regression/442-000238.wren

@@ -0,0 +1,2 @@
+// expect error line 2
+class W00000000000000000000000000000000000ÖÖÜëùëë

test/regression/442-000295.wren

@@ -0,0 +1,2 @@
+// expect error line 2
+class W00000000000000000000000000000000000ÖÖÖÖÖÖÖ

test/regression/442-000321.wren

@@ -0,0 +1,2 @@
+// expect error line 2
+classW00000000000000000000000000000000000ÖÖÖÖÖÖÖ

test/regression/442-000348.wren

@@ -0,0 +1,2 @@
+// expect error line 2
+class W000 y0000000000000000000000000000000000000000000000000ÖÖÖÖÖÖ

test/regression/442-000357.wren

@@ -0,0 +1,2 @@
+// expect error line 2
+class W00000000000000000000000000000000000«««««««

test/regression/442-000440.wren

@@ -0,0 +1,2 @@
+// expect error line 2
+class W00000000000000000000000000000000000«««««««

test/regression/442-000665.wren

@@ -0,0 +1,4 @@
+// expect error line 3
+// expect error line 4
+0.p(""0
+class¾S00000000000000000000000000000000000ëëëëìëë