feat(sveltekit): Add support for SDK setup with instrumentation.server.ts

[Lms24]

This PR adds support for setting up the SDK with SvelteKit's new instrumentation.server.ts instrumentation file, as well as by leveraging the new spans emitted from kit. This requires a SvelteKit version of at least 2.31.0. Of course we want to stay backwards compatible, so this PR adds the following flow:

We check for version from package.json (I'm, this is flawed and could mean we identify a version <2.31.0 when in fact it is already used. But then again, if not explicitly set in package.json, we can't rely on >= 2.31.0 being used). If we identify <2.31.0, we recommend updating to the newest version.

From this point, there are 3 options for the user:

1. update kit: exits the wizard and lets the user update kit. I don't think we should do this for them.
2. users are already using >=2.31.0 (i.e. false negative from our end): Continue with new instrumentation file setup
3. user will upgrade later: Continue with old, hooks-based setup.

If we detect a version >=2.31.0, we don't ask anything but directly continue with the new setup.

For the old setup, nothing changes.

For the new setup, we now apply the following changes:

• enable instrumentation and tracing in svelte.config.js
• add Sentry.init into instrumentation.server.mjs
• add handle and error hooks into hooks.server.ts
• add Sentry.init and error hook into hooks.client.ts

(So to clear up any confusion: We still make use of hooks files but the server-side SDK init got extracted to the instrumentaiton file)

Additionally, added some tests and a new e2e test.

closes #1075

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Generated by 🚫 dangerJS against 35bc982

[codecov]

Codecov Report

❌ Patch coverage is 37.01997% with 410 lines in your changes missing coverage. Please review.
✅ Project coverage is 32.06%. Comparing base (a461c2c) to head (35bc982).
⚠️ Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
src/sveltekit/sdk-setup/setup.ts	4.37%	153 Missing ⚠️
src/sveltekit/sdk-setup/svelte-config.ts	65.65%	102 Missing ⚠️
src/sveltekit/sdk-setup/vite.ts	12.38%	92 Missing ⚠️
src/sveltekit/sveltekit-wizard.ts	4.34%	44 Missing ⚠️
src/sveltekit/sdk-setup/utils.ts	13.33%	13 Missing ⚠️
src/sveltekit/utils.ts	0.00%	5 Missing ⚠️
src/sveltekit/sdk-example.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1077      +/-   ##
==========================================
+ Coverage   31.53%   32.06%   +0.52%     
==========================================
  Files         129      133       +4     
  Lines       15169    15638     +469     
  Branches     1032     1093      +61     
==========================================
+ Hits         4784     5014     +230     
- Misses      10368    10607     +239     
  Partials       17       17              

Flag	Coverage Δ
unit-tests	32.06% <37.01%> (+0.52%)	⬆️

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[Lms24]

Hmm I really dislike that our e2e tests don't contribute to our coverage calculation. Maybe we can find some way to run them within the same process as the test. Might be a nice addition for clifty. Though not sure how this would work yet.

vitest and child process coverage doesn't seem to go anywhere (vitest-dev/vitest#2911)

[Lms24]

I had to rename the sveltekit test app to sveltekit-hooks to avoid ambiguity with sveltekit-tracing.

[Lms24]

Decided to split this file up since there's quite a lot going on in it. Hence the various new files in the sdk-setup dir

[andreiborza]

Really nice!

[andreiborza]

Nice!