Add docs/V1_16_VALIDATION.md from Claro v1.17.26 zip

docs/V1_16_VALIDATION.md

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+# Claro v1.17.26 Validation
+
+Validated commands:
+
+```bash
+gcc -std=c99 src/claro.c -O0 -o claro -lm
+./claro --version
+./claro test
+./claro validate
+```
+
+Expected result:
+
+```text
+Claro v1.17.26
+PASS: 0 failure(s)
+Validation passed. Claro v1.17.26 networking reliability is ready for use.
+```
+
+Additional project/package workflow validation:
+
+```bash
+./claro new DemoProject
+cd DemoProject
+../claro package doctor
+../claro package add text
+../claro package add text
+../claro package list
+../claro package remove text
+../claro package list
+../claro run
+```
+
+The second `package add text` should not duplicate the package.