DEVX-6851: Add Meetings API

[superchilled]

This PR adds functionality for the Meetings API to the SDK. Specifically, it does the following:

• Updates the Client class to add a meetings method which returns a Meetings object
• Defines a Meetings class with the following methods:
  • rooms (returns a Meetings::Rooms object)
  • recordings (returns a Meetings::Recordings object)
  • sessions (returns a Meetings::Sessions object)
  • themes (returns a Meetings::Themes object)
  • applications (returns a Meetings::Applications object)
  • dial_in_numbers (returns a Meetings::DialInNumbers object)
• Defines a Meetings::Rooms class with the following methods:
  • list
  • info
  • create
  • update
• Defines a Meetings::Recordings class with the following methods:
  • info
  • delete
• Defines a Meetings::Sessions class with the following methods:
  • list_recordings
• Defines a Meetings::Themes class with the following methods:
  • list
  • info
  • create
  • update
  • delete
  • list_rooms
  • set_logo
• Defines a Meetings::Applications class with the following methods:
  • update
• Defines a Meetings::DialInNumbers class with the following methods:
  • list
• Adds unit tests for all of the above functionality

[codecov-commenter]

Codecov Report

Merging #258 (1d1f3a0) into main (06b54c2) will increase coverage by 0.11%.
The diff coverage is 99.38%.

❗ Current head 1d1f3a0 differs from pull request most recent head 122dad7. Consider uploading reports for the commit 122dad7 to get more accurate results

@@            Coverage Diff             @@
##             main     #258      +/-   ##
==========================================
+ Coverage   97.82%   97.94%   +0.11%     
==========================================
  Files          94      105      +11     
  Lines        1796     1944     +148     
==========================================
+ Hits         1757     1904     +147     
- Misses         39       40       +1     

Impacted Files	Coverage Δ
lib/vonage/namespace.rb	100.00% <ø> (ø)
lib/vonage/errors.rb	97.14% <95.23%> (-2.86%)	⬇️
lib/vonage/client.rb	100.00% <100.00%> (ø)
lib/vonage/meetings.rb	100.00% <100.00%> (ø)
lib/vonage/meetings/applications.rb	100.00% <100.00%> (ø)
lib/vonage/meetings/dial_in_numbers.rb	100.00% <100.00%> (ø)
...b/vonage/meetings/dial_in_numbers/list_response.rb	100.00% <100.00%> (ø)
lib/vonage/meetings/recordings.rb	100.00% <100.00%> (ø)
lib/vonage/meetings/rooms.rb	100.00% <100.00%> (ø)
lib/vonage/meetings/rooms/list_response.rb	100.00% <100.00%> (ø)
... and 4 more

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