Add API Blueprint for Panel Permissions

[prabhupant]

Fixes #5298

Checklist

• I have read the Contribution & Best practices Guide and my PR follows them.
• My branch is up-to-date with the Upstream development branch.
• The unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

• All the functions created/modified in this PR contain relevant docstrings.

Short description of what this resolves:

Add API Blueprints for panel permissions

Changes proposed in this pull request:

• added API blueprints for panel permissions

[abhinavk96]

Mention Fixes #issue number as in the PR template.

[prabhupant]

Mention Fixes #issue number as in the PR template.

@CosmicCoder96 its already mentioned

[bhaveshAn]

Travis isn't passing. Please check implementation of other API blueprints thoroughly.

[bhaveshAn]

Travis is failing due to same reason as #5433 (comment)

[codecov]

Codecov Report

Merging #5432 into development will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           development    #5432   +/-   ##
============================================
  Coverage        62.76%   62.76%           
============================================
  Files              261      261           
  Lines            12623    12623           
============================================
  Hits              7923     7923           
  Misses            4700     4700

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[prabhupant]

@bhaveshAn please review again now