feat: Change repo panel to display workflow count

[cbartz]

Applicable spec: n/a

Overview

Change panel to look like

Rationale

It makes it easier to find respective workflows (e.g. with huge count).

Checklist

• The charm style guide was applied.
• The contributing guide was applied.
• The changes are compliant with ISD054 - Managing Charm Complexity
• The documentation for charmhub is updated.
• The PR is tagged with appropriate label (urgent, trivial, complex).
• The changelog is updated with changes that affects the users of the charm.

[github-actions]

Test results for commit 0481c16

Test coverage for 0481c16

Wrote XML report to coverage/coverage.xml

Static code analysis report

Run started:2025-06-27 12:16:29.576188

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 1929
  Total lines skipped (#nosec): 2
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 1

Run metrics:
  Total issues (by severity):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
  Total issues (by confidence):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
Files skipped (0):