WD-8528 - feat: Display errors in Actions Panel

[vladimir-cucu]

Done

• Display inline error when trying to get actions for application.
• Display error in toast when trying to execute action on units.

QA

• To test the loading state of the button, you can add the following code at the beginning of executeAction function definition:

  const executeActionPromise = new Promise((resolve, reject) => {
  setTimeout(() => {
  reject(new Error());
  }, 2000);
  });
  await executeActionPromise;

Details

• https://warthogs.atlassian.net/browse/WD-8528

[webteam-app]

Demo starting at https://juju-dashboard-1691.demos.haus

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (aa059d2) 95.04% compared to head (53e1808) 95.07%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1691 +/- ## ========================================== + Coverage 95.04% 95.07% +0.03% ========================================== Files 182 183 +1 Lines 5325 5359 +34 Branches 1545 1555 +10 ========================================== + Hits 5061 5095 +34 Misses 243 243 Partials 21 21 ```

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