feat(shell): enhance regex validators to match on entire string (#1603)

.changes/shell-open-regex-match-string.md

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+---
+"shell": patch
+---
+
+Change the `open` scope validator regex to match on the entire string.

.changes/shell-regex-match-string.md

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+---
+"shell": patch
+---
+
+Change the `execute` scope argument validator regex to match on the entire string by default.
+If this behavior is not desired check the `raw` boolean configuration option that is available along the `validator` string.