feat: implement OSDetector

[rauno56]

Which problem is this PR solving?

There's currently no detector for os.* resource attributes.
Related: #2921

Short description of the changes

Added a new detector for detecting OS attributes:

• os.type which is the only required attribute and
• os.version.

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

How Has This Been Tested?

• Added unit tests

Checklist:

• Followed the style guidelines of this project
• Unit tests have been added
• Documentation has been updated

Related: open-telemetry/opentelemetry-specification#2509

[codecov]

Codecov Report

Merging #2927 (bf8fd83) into main (df77c62) will decrease coverage by 0.71%.
The diff coverage is 87.50%.

❗ Current head bf8fd83 differs from pull request most recent head 7b700f0. Consider uploading reports for the commit 7b700f0 to get more accurate results

@@            Coverage Diff             @@
##             main    #2927      +/-   ##
==========================================
- Coverage   92.50%   91.79%   -0.72%     
==========================================
  Files         171      178       +7     
  Lines        5353     5607     +254     
  Branches     1160     1216      +56     
==========================================
+ Hits         4952     5147     +195     
- Misses        401      460      +59     

Impacted Files	Coverage Δ
...pentelemetry-resources/src/detectors/OSDetector.ts	86.66% <86.66%> (ø)
...ges/opentelemetry-resources/src/detectors/index.ts	100.00% <100.00%> (ø)
...telemetry-sdk-trace-web/src/StackContextManager.ts	94.28% <0.00%> (ø)
...-sdk-trace-web/src/enums/PerformanceTimingNames.ts	100.00% <0.00%> (ø)
...entelemetry-sdk-trace-web/src/WebTracerProvider.ts	100.00% <0.00%> (ø)
packages/opentelemetry-sdk-trace-web/src/types.ts	100.00% <0.00%> (ø)
...ckages/opentelemetry-sdk-trace-web/karma.worker.js	100.00% <0.00%> (ø)
packages/opentelemetry-sdk-trace-web/src/utils.ts	65.62% <0.00%> (ø)

[blumamir]

great work again