[projmgr] Add telnet handling

[grasci-arm]

Related to ARM-software/vscode-cmsis-csolution#424

[github-actions]

Test Results

    3 files     21 suites   13m 41s ⏱️
  435 tests   435 ✅ 0 💤 0 ❌
1 305 runs  1 305 ✅ 0 💤 0 ❌

Results for commit 093c4b2.

[codecov]

Codecov Report

❌ Patch coverage is 82.50000% with 21 lines in your changes missing coverage. Please review.
✅ Project coverage is 66.37%. Comparing base (1119d51) to head (093c4b2).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
tools/projmgr/test/src/ProjMgrUnitTests.cpp	75.60%	0 Missing and 10 partials ⚠️
tools/projmgr/src/ProjMgrRunDebug.cpp	80.95%	1 Missing and 7 partials ⚠️
tools/projmgr/src/ProjMgrWorker.cpp	40.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2299      +/-   ##
==========================================
+ Coverage   66.32%   66.37%   +0.05%     
==========================================
  Files         181      181              
  Lines       36545    36658     +113     
  Branches    22712    22797      +85     
==========================================
+ Hits        24237    24331      +94     
- Misses       7625     7628       +3     
- Partials     4683     4699      +16     

Flag	Coverage Δ
projmgr-cov	80.31% <82.50%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
tools/projmgr/include/ProjMgrParser.h	100.00% <ø> (ø)
tools/projmgr/include/ProjMgrRunDebug.h	100.00% <ø> (ø)
tools/projmgr/include/ProjMgrWorker.h	75.86% <ø> (ø)
tools/projmgr/src/ProjMgrCbuildRun.cpp	94.79% <100.00%> (+0.28%)	⬆️
tools/projmgr/src/ProjMgrYamlParser.cpp	84.25% <100.00%> (+0.35%)	⬆️
tools/projmgr/src/ProjMgrWorker.cpp	88.07% <40.00%> (-0.04%)	⬇️
tools/projmgr/src/ProjMgrRunDebug.cpp	85.74% <80.95%> (-0.38%)	⬇️
tools/projmgr/test/src/ProjMgrUnitTests.cpp	79.07% <75.60%> (-0.04%)	⬇️

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