PMM-13722 PMM Navigation - Iframe communication

[matejkubinec]

Changed in the PR include the following:

• Switch to usage of PNPM and turbomodules for UI code
• Adds grafana plugin for communication with PMM UI
• Adds shared package to shared code between PMM UI and grafana plugin
• TBD...

PMM-13722

Link to the Feature Build: SUBMODULES-0

If this PR adds or removes or alters one or more API endpoints, please review and add or update the relevant API documents as well:

• API Docs updated

If this PR is related to some other PRs in this or other repositories, please provide links to those PRs:

• Links to related pull requests (optional).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 43.87%. Comparing base (fa643aa) to head (fb0bf37).
Report is 4 commits behind head on v3.

Additional details and impacted files

@@           Coverage Diff           @@
##               v3    #3787   +/-   ##
=======================================
  Coverage   43.87%   43.87%           
=======================================
  Files         367      367           
  Lines       44627    44627           
=======================================
  Hits        19580    19580           
- Misses      23363    23366    +3     
+ Partials     1684     1681    -3     

Flag	Coverage Δ
admin	11.47% <ø> (-0.05%)	⬇️
agent	52.50% <ø> (ø)
managed	45.46% <ø> (+<0.01%)	⬆️
vmproxy	73.45% <ø> (ø)

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