Add renovate configuration

[arturo-seijas]

Applicable spec: N/A

Overview

Add renovate configuration

Rationale

Renovate config was missing. This will automate some work in new repos

Juju Events Changes

N/A

Module Changes

N/A

Library Changes

N/A

Checklist

• The charm style guide was applied
• The contributing guide was applied
• The changes are compliant with ISD054 - Managing Charm Complexity
• The documentation is generated using src-docs
• The documentation for charmhub is updated
• The PR is tagged with appropriate label (urgent, trivial, complex)

[github-actions]

Test coverage for fc7bd41

Name           Stmts   Miss Branch BrPart  Cover   Missing
----------------------------------------------------------
src/charm.py      30      0      4      0   100%
----------------------------------------------------------
TOTAL             30      0      4      0   100%

Static code analysis report

Run started:2023-11-28 13:29:30.500225

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 149
  Total lines skipped (#nosec): 0
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 0

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):