State that these functions are not vectorised (or vectorise them?)

Here is an example:

```
CTNote::count_matches(use_pattern = c("-----", "o-o--"), match_is = "-")
```
This returns the (somewhat confusing) error
```
Error in if (pattern_trim_length == 0) { : the condition has length > 1
```

We need to

1. vectorise all the functions, or
2. add a better error message and function documentation AND add calls to `dplyr::rowwise()` in the examples