Introduced directories into the wiki and added content based on my talk with Bodo and my own thoughts

error-messages/Missing common functions.md

+
+Hardcoded missing functions. 
+For instance if `print` does not exist it should tell you to `use StdIO: all;`
+
+To realize this we could create a table of functions in the standard library. 
+Before emmiting a general could not find function we could first look if a matching function exists in this table. 
+# Example
+
+### Code
+
+```
+int main() {
+	printf("Hey there!")
+	return 0;
+}
+```
+
+### Error:
+
+```
+I could not find the printf function. 
+
+2 | printf("Hey there!")
+    ^^^^^^
+
+To use this function you should add use `StdIO: all;`
+```
+