chore: concatenate all namespaces c++17-style

[mojomex]

PR Type

• Improvement

Related Links

Description

These changes are auto-applied by Clang-Tidy.
I confirmed all diffs are of the shape (old -> new)

namespace a {
namespace b {
} // b
} // a

->

namespace a::b {
} // a::b

Review Procedure

None necessary if CI passes.

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• Commits are properly organized and messages are according to the guideline
• (Optional) Unit tests have been written for new behavior
• PR title describes the changes

Post-Review Checklist for the PR Author

PR Author should check the checkboxes below before merging.

• All open points are addressed and tracked via issues or tickets

CI Checks

• Build and test for PR: Required to pass before the merge.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

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Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #207   +/-   ##
=======================================
  Coverage        ?   25.76%           
=======================================
  Files           ?       99           
  Lines           ?     8755           
  Branches        ?     2203           
=======================================
  Hits            ?     2256           
  Misses          ?     6114           
  Partials        ?      385           

Flag	Coverage Δ
differential	25.76% <ø> (?)

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[drwnz]

LGTM!