chore: remove author attribution from TODO comments across multiple source files

Remove "(bob)" author prefix from all TODO comments in benchmark/method_call.wren, include/wren.h, src/main.c, src/wren_common.h, src/wren_compiler.c, src/wren_core.c, src/wren_value.c, src/wren_value.h, and src/wren_vm.c. Update the TODO_PATTERN regex in metrics script to match the new format without author parentheses. Also refactor test file counting in metrics to use os.walk with fnmatch for recursive directory traversal instead of glob.iglob.

test/list/count.wren

@@ -2,6 +2,6 @@ io.write([].count)           // expect: 0
 io.write([1].count)          // expect: 1
 io.write([1, 2, 3, 4].count) // expect: 4
 
-// TODO(bob): Literal syntax, including newline handling.
-// TODO(bob): Unterminated list literal.
-// TODO(bob): Subscript operator.
+// TODO: Literal syntax, including newline handling.
+// TODO: Unterminated list literal.
+// TODO: Subscript operator.

test/list/insert.wren

@@ -1,5 +1,5 @@
-// TODO(bob): What happens if the index isn't an integer?
-// TODO(bob): Out of bounds.
+// TODO: What happens if the index isn't an integer?
+// TODO: Out of bounds.
 
 // Add to empty list.
 var a = []

test/list/remove_at.wren

@@ -24,7 +24,7 @@ f.removeAt(-1)
 io.write(f) // expect: [1, 2]
 
 // Out of bounds.
-// TODO(bob): Signal error in better way.
+// TODO: Signal error in better way.
 io.write([1, 2, 3].removeAt(3)) // expect: null
 io.write([1, 2, 3].removeAt(-4)) // expect: null
 

test/list/subscript.wren

@@ -12,14 +12,14 @@ io.write(list[-2]) // expect: c
 io.write(list[-1]) // expect: d
 
 // Handle out of bounds.
-// TODO(bob): Should halt the fiber or raise an error somehow.
+// TODO: Should halt the fiber or raise an error somehow.
 io.write(list[4])  // expect: null
 io.write(list[-5]) // expect: null
 
 // Handle wrong argument type.
-// TODO(bob): Should halt the fiber or raise an error somehow.
+// TODO: Should halt the fiber or raise an error somehow.
 io.write(list[true]) // expect: null
 
 // Handle non-integer index.
-// TODO(bob): Should halt the fiber or raise an error somehow.
+// TODO: Should halt the fiber or raise an error somehow.
 io.write(list[1.5]) // expect: null