started writing lexer after making string lib

string/docs/check/contains.md

@@ -0,0 +1,25 @@
+# string_Contains
+Check if a string has another string in it.
+
+## Arguments
+- haystack (string): the string to check against.
+- needle (string): the string to look for.
+
+## Returns
+found (bool): returns `true` if `haystack` has `needle` inside it. 
+
+## Example
+### Ground
+```python
+call !string_Contains "The task was completed successfully." "success" &found
+println $found # true
+
+call !string_Contains "The task failed." "success" &found
+println $found # false
+```
+
+### Solstice
+```c
+puts string_Contains("The task was completed successfully.", "success") // true
+puts string_Contains("The task failed.", "success") // false
+```