### _Why are the changes needed?_
This PR adds a basic Grafana Dashboard template, also updates the metrics docs to guide users to use Prometheus and Grafana to monitor the Kyuubi server.
The Grafana Dashboard template is exported from the Grafana OSS v11.4.0
### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible
- [x] Add screenshots for manual tests if appropriate
<img width="1484" alt="image" src="https://github.com/user-attachments/assets/417b35fa-cd12-4e51-b73f-2955282aa187" />
- [ ] [Run test](https://kyuubi.readthedocs.io/en/master/contributing/code/testing.html#running-tests) locally before make a pull request
Closes#5147 from zhaohehuhu/Improvement-0809.
Closes#5834
f6fc2d71e [Cheng Pan] fix style
465f0546a [Cheng Pan] update dashboard
3fa2d237e [hezhao2] add status chart
4b2bd3dbc [hezhao2] add status chart
185f2cccf [hezhao2] make it compatible with kyuubi 1.8
457085be5 [hezhao2] add REAMDE.md to guide users
45e3ba3e5 [hezhao2] add docker file build a grafana image and load dashboards available
dbc22108b [hezhao2] Add Grafana dashboard template
Lead-authored-by: hezhao2 <hezhao2@cisco.com>
Co-authored-by: Cheng Pan <chengpan@apache.org>
Signed-off-by: Cheng Pan <chengpan@apache.org>
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