[Instrumentation.Process] Added Grafana dashboard template to the example folder.

[Yun-Ting]

Changes

Addressed #447 (comment)
Added Grafana dashboard template to the example folder.

[codecov]

Codecov Report

Merging #1016 (8c6ceb3) into main (d0190c3) will decrease coverage by 0.79%.
The diff coverage is n/a.

❗ Current head 8c6ceb3 differs from pull request most recent head 5b71895. Consider uploading reports for the commit 5b71895 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1016      +/-   ##
==========================================
- Coverage   69.39%   68.60%   -0.79%     
==========================================
  Files         200      199       -1     
  Lines        7636     7600      -36     
==========================================
- Hits         5299     5214      -85     
- Misses       2337     2386      +49     

Impacted Files	Coverage Δ
...porter.OneCollector/OneCollectorExporterOptions.cs	0.00% <0.00%> (-100.00%)	⬇️
...orter.OneCollector/Logs/OneCollectorLogExporter.cs	0.00% <0.00%> (-100.00%)	⬇️
...neCollector/Logs/OneCollectorLogExporterOptions.cs	0.00% <0.00%> (-90.91%)	⬇️
...neCollectorOpenTelemetryLoggerOptionsExtensions.cs	0.00% <0.00%> (-76.00%)	⬇️
...eCollector/OneCollectorExporterTransportOptions.cs	0.00% <0.00%> (-72.23%)	⬇️
...etry.Exporter.OneCollector/OneCollectorExporter.cs	0.00% <0.00%> (-50.00%)	⬇️
...tor/Internal/Sinks/WriteDirectlyToTransportSink.cs	89.47% <0.00%> (-1.32%)	⬇️
...neCollector/Logs/OneCollectorLogExporterBuilder.cs