Deprecate old dapr client

[withinboredom]

Description

Deprecate the old client.

Issue reference

We strive to have all PR being opened based on an issue, where the problem or feature have been discussed prior to
implementation.

Please reference the issue this PR references: #36

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Tests pass
• Created/updated tests
• Extended the documentation

[codecov-commenter]

Codecov Report

Merging #111 (12ea229) into main (3ef152f) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #111   +/-   ##
=========================================
  Coverage     77.05%   77.05%           
  Complexity      540      540           
=========================================
  Files            64       64           
  Lines          1748     1748           
=========================================
  Hits           1347     1347           
  Misses          401      401           

Impacted Files	Coverage Δ
src/lib/DaprClient.php	0.00% <ø> (ø)

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