feat: add supports for write structured data - NamedTuple, Data Classes

[bednar]

Closes #289

Proposed Changes

1. Added supports for write NamedTuple type
2. Added supports for write Data Classes type
3. Added example how to write structured data

Checklist

• CHANGELOG.md updated
• Rebased/mergeable
• A test has been added if appropriate
• pytest tests completes successfully
• Commit messages are in semantic format
• Sign CLA (if not already signed)

[codecov-commenter]

Codecov Report

Merging #330 (f8af0a8) into master (74d89a7) will decrease coverage by 0.90%.
The diff coverage is 89.47%.

@@            Coverage Diff             @@
##           master     #330      +/-   ##
==========================================
- Coverage   92.54%   91.64%   -0.91%     
==========================================
  Files          27       27              
  Lines        2226     2237      +11     
==========================================
- Hits         2060     2050      -10     
- Misses        166      187      +21     

Impacted Files	Coverage Δ
influxdb_client/client/write_api.py	92.07% <76.47%> (-7.00%)	⬇️
influxdb_client/client/write/point.py	97.27% <100.00%> (+0.24%)	⬆️
influxdb_client/rest.py	80.45% <0.00%> (-3.76%)	⬇️
influxdb_client/configuration.py	82.75% <0.00%> (-1.12%)	⬇️
influxdb_client/api_client.py	68.56% <0.00%> (-0.36%)	⬇️
influxdb_client/client/flux_csv_parser.py	97.43% <0.00%> (-0.06%)	⬇️

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[rhajek]

LGTM