Update README.md

[Thanhphan1147]

Update README to follow the template defined at : https://github.com/canonical/is-charms-template-repo

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)

[erinecon]

Thanks for updating the README!

[erinecon]

Thanks for updating the README!

[github-actions]

license-eye has checked 62 files.

Valid	Invalid	Ignored	Fixed
0	21	41	0

Click to see the invalid file list

• charmcraft.yaml
• generate-src-docs.sh
• pyproject.toml
• src/agent_observer.py
• src/charm.py
• src/charm_state.py
• src/service.py
• templates/jenkins_agent.sh
• tests/init.py
• tests/conftest.py
• tests/integration/init.py
• tests/integration/conftest.py
• tests/integration/pre_run_script.sh
• tests/integration/test_agent.py
• tests/unit/init.py
• tests/unit/conftest.py
• tests/unit/test_agent.py
• tests/unit/test_charm.py
• tests/unit/test_service.py
• tests/unit/test_state.py
• tox.ini

Use this command to fix any missing license headers

```bash

docker run -it --rm -v $(pwd):/github/workspace apache/skywalking-eyes header fix

</details>

[github-actions]

Test coverage for c75e8dd

Name                    Stmts   Miss Branch BrPart  Cover   Missing
-------------------------------------------------------------------
src/agent_observer.py      41      0      4      0   100%
src/charm.py               61      0     10      0   100%
src/charm_state.py         58      4      4      1    92%   114, 172-174
src/service.py             93      5      8      4    91%   95-97, 128, 159, 196->200, 198->196
-------------------------------------------------------------------
TOTAL                     253      9     26      5    95%

Static code analysis report

Run started:2025-01-17 16:21:55.369053

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 1133
  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):