feat: create Client from connection string or environment variables

[alespour]

Closes #

Proposed Changes

This PR adds support to create Client from

• connection string eg. https://us-east-1-1.aws.cloud2.influxdata.com?token=my-token&database=my-database Supported parameters:
  • token
  • org
  • database
  • precision
  • gzipThreshold
• environment variables - same names/style as Influx CLI
  • INFLUX_HOST
  • INFLUX_TOKEN
  • INFLUX_ORG
  • INFLUX_DATABASE
  • INFLUX_PRECISION
  • INFLUX_GZIP_THRESHOLD

Checklist

• [x] CHANGELOG.md updated
• [x] Rebased/mergeable
• [x] A test has been added if appropriate
• [x] Tests pass
• [x] Commit messages are conventional

[codecov[bot]]

Codecov Report

All modified lines are covered by tests :white_check_mark:

Comparison is base (b26e715) 98.84% compared to head (66100b7) 98.90%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #46 +/- ## ========================================== + Coverage 98.84% 98.90% +0.05% ========================================== Files 12 12 Lines 955 1007 +52 ========================================== + Hits 944 996 +52 Misses 11 11 ``` | [Files](https://app.codecov.io/gh/InfluxCommunity/influxdb3-csharp/pull/46?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=InfluxCommunity) | Coverage Δ | | |---|---|---| | [Client/Config/ClientConfig.cs](https://app.codecov.io/gh/InfluxCommunity/influxdb3-csharp/pull/46?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=InfluxCommunity#diff-Q2xpZW50L0NvbmZpZy9DbGllbnRDb25maWcuY3M=) | `100.00% <100.00%> (ø)` | | | [Client/Config/WriteOptions.cs](https://app.codecov.io/gh/InfluxCommunity/influxdb3-csharp/pull/46?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=InfluxCommunity#diff-Q2xpZW50L0NvbmZpZy9Xcml0ZU9wdGlvbnMuY3M=) | `100.00% <100.00%> (ø)` | | | [Client/InfluxDBClient.cs](https://app.codecov.io/gh/InfluxCommunity/influxdb3-csharp/pull/46?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=InfluxCommunity#diff-Q2xpZW50L0luZmx1eERCQ2xpZW50LmNz) | `94.76% <100.00%> (+0.15%)` | :arrow_up: |

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