feat: add build flags for enabling a KSCrash Integration

[NinjaLikesCheez]

📜 Description

Introduce a new ENABLE_KSCRASH SPM trait/build flag that gates:

• Fetching of KSCrash dependency
• Compilation of Sentry KSCrash Integration instead of SentryCrash Integration

💡 Motivation and Context

This allows us to start fleshing out a KSCrash integration without affecting consumers of the SDK (i.e. they won't download the dependency and it won't be included in their build). Likewise, this will allow developers to work on V10 without having to enable an in-flight KSCrash integration.

💚 How did you test it?

• Builds passing
• Existing tests passing
• CI Passing

📝 Checklist

You have to check all boxes before merging:

• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• I updated the wizard if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.
• If I added a new public API, I also added it to the SentryObjC wrapper.

#skip-changelog

[github-actions]

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Generated by 🚫 dangerJS against 93c1b68

[sentry]

📲 Install Builds

iOS

🔗 App Name	App ID	Version	Configuration
SDK-Size	io.sentry.sample.SDK-Size	9.19.0 (1)	Release

⚙️ sentry-cocoa Build Distribution Settings

[github-actions]

🚨 Detected changes in high risk code 🚨

High-risk code can easily blow up and is hard to test. We had severe bugs in the past. Be extra careful when changing these files, and have an extra careful look at these:

• .github/file-filters.yml

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1222.72 ms	1258.86 ms	36.14 ms
Size	24.14 KiB	1.22 MiB	1.20 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
71e6611	1213.27 ms	1242.25 ms	28.98 ms
2446b3d	1218.36 ms	1253.98 ms	35.62 ms
86bd73c	1232.52 ms	1269.53 ms	37.01 ms
bf10fe6	1226.00 ms	1260.76 ms	34.76 ms
5804f33	1208.40 ms	1241.33 ms	32.93 ms
379d045	1210.00 ms	1241.24 ms	31.24 ms
a781a3d	1210.98 ms	1244.31 ms	33.33 ms
a48979e	1244.58 ms	1269.00 ms	24.42 ms
151b3ee	1238.69 ms	1270.73 ms	32.05 ms
36c25b3	1229.10 ms	1255.83 ms	26.73 ms

App size

Revision	Plain	With Sentry	Diff
71e6611	24.14 KiB	1.15 MiB	1.12 MiB
2446b3d	24.14 KiB	1.17 MiB	1.15 MiB
86bd73c	24.14 KiB	1.16 MiB	1.13 MiB
bf10fe6	24.14 KiB	1.17 MiB	1.15 MiB
5804f33	24.14 KiB	1.18 MiB	1.16 MiB
379d045	24.14 KiB	1.18 MiB	1.15 MiB
a781a3d	24.14 KiB	1.16 MiB	1.13 MiB
a48979e	24.14 KiB	1.17 MiB	1.15 MiB
151b3ee	24.14 KiB	1.15 MiB	1.13 MiB
36c25b3	24.14 KiB	1.18 MiB	1.16 MiB