fix: prevent slice bounds panic in Row.matchAll

[Yanhu007]

Fixes #59

Problem

Row.matchAll panics with slice bounds out of range for certain glob patterns:

gg, _ := glob.Compile("/{a{*.json{", '/')
gg.Match("/a/b/c/d/e/foo.json")  // PANIC: slice bounds out of range

The computed slice end idx + next + 1 can exceed the string length when the pattern produces a Row with RunesLength larger than the actual string being matched.

Fix

Add explicit bounds checks before slicing:

1. Return false early if fewer runes are available than needed
2. Return false if the computed end index exceeds string length

All existing tests pass, plus the reproducer from the issue now returns false instead of panicking.