Feedback on formula success/failure

[seasonsteven]

Is your feature request related to a problem? Please describe.
When a table fails to update, the plugin provides no feedback. I don't know which formula caused the issue, or whether evaluation succeeded at all. This makes debugging difficult and leaves me uncertain if the formulas were processed correctly.

Describe the solution you'd like
Some sort of feedback when I do "evaluate table formulas".

Describe alternatives you've considered
Success: A toast notification or a brief flash on updated target cells.
Errors: An icon next to any formula that failed, optionally clickable to show the error message explaining which part failed.

Additional context
Example: This table fails to update because 50b breaks the sum function. While this is obvious in a small table, it would be easy to miss in a large one where target cells might not be visible at the same time. And the more formulas, the harder to track the error down.

| Values | Values 2 |
| ------ | -------- |
| 1      | 1        |
| 2      | 2        |
| 3      | 3        |
| 4      | 4        |
| 5      | 50b      |
|        |          |
<!-- TBLFM: @>$1=sum(@I..@-1) -->
<!-- TBLFM: @>$2=sum(@I..@-1) -->