Add thread info helper

[noahsmartin]

Moves some swift imports out of ObjC++ by defining a helper that does not import Swift to perform the C++ code

#skip-changelog

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.983%. Comparing base (f96ab19) to head (e082643).
Report is 14 commits behind head on main.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #5331       +/-   ##
=============================================
+ Coverage   92.903%   92.983%   +0.079%     
=============================================
  Files          691       702       +11     
  Lines        86707     87876     +1169     
  Branches     31235     31533      +298     
=============================================
+ Hits         80554     81710     +1156     
- Misses        6054      6064       +10     
- Partials        99       102        +3     

Files with missing lines	Coverage Δ
Sources/Sentry/PrivateSentrySDKOnly.mm	23.222% <ø> (ø)
Sources/Sentry/SentryThread.mm	100.000% <100.000%> (ø)
Sources/Sentry/SentryTransactionContext.m	100.000% <100.000%> (ø)

... and 38 files with indirect coverage changes

---

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1209.56 ms	1238.29 ms	28.72 ms
Size	23.76 KiB	835.94 KiB	812.18 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
8cf5bca	1231.33 ms	1237.81 ms	6.48 ms
de033da	1206.55 ms	1217.08 ms	10.53 ms
beb7ff7	1211.40 ms	1224.12 ms	12.73 ms
5949b9e	1235.45 ms	1260.21 ms	24.76 ms
4bca912	1252.42 ms	1260.06 ms	7.64 ms
313b1d9	1240.18 ms	1258.44 ms	18.26 ms
5783680	1223.63 ms	1243.60 ms	19.97 ms
2124551	1201.23 ms	1225.34 ms	24.11 ms
b9b0f0a	1220.20 ms	1229.27 ms	9.06 ms
c0ff306	1218.92 ms	1240.64 ms	21.72 ms

App size

Revision	Plain	With Sentry	Diff
8cf5bca	21.58 KiB	671.30 KiB	649.72 KiB
de033da	21.58 KiB	418.15 KiB	396.57 KiB
beb7ff7	21.58 KiB	669.46 KiB	647.87 KiB
5949b9e	22.30 KiB	832.29 KiB	809.98 KiB
4bca912	22.85 KiB	411.14 KiB	388.29 KiB
313b1d9	22.85 KiB	414.11 KiB	391.26 KiB
5783680	21.58 KiB	714.18 KiB	692.60 KiB
2124551	22.85 KiB	411.69 KiB	388.84 KiB
b9b0f0a	20.76 KiB	434.94 KiB	414.18 KiB
c0ff306	20.76 KiB	434.65 KiB	413.89 KiB

Previous results on branch: objcThreadHelper

Startup times

Revision	Plain	With Sentry	Diff
52e61e1	1223.19 ms	1255.80 ms	32.61 ms

App size

Revision	Plain	With Sentry	Diff
52e61e1	23.76 KiB	830.94 KiB	807.18 KiB

[philprime]

Left some minor comments, feel free to proceed.