feat: webview for the graphical editor

[GideonKoenig]

Related to #1243

Summary of Changes

Adds the svelte package, that provides the webview for the graphical editor.

[github-actions]

🦙 MegaLinter status: ❌ ERROR

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
❌ CSS	stylelint	3	0	1	1.47s
✅ JAVASCRIPT	eslint	3	0	0	2.95s
✅ JAVASCRIPT	prettier	3	0	0	0.96s
✅ JSON	jsonlint	6		0	0.21s
✅ JSON	npm-package-json-lint	yes		no	0.41s
✅ JSON	prettier	75	7	0	1.9s
✅ JSON	v8r	6		0	18.69s
✅ MARKDOWN	markdown-link-check	1		0	0.64s
✅ REPOSITORY	git_diff	yes		no	0.23s
✅ TSX	eslint	66	0	0	13.01s
✅ TYPESCRIPT	eslint	38	0	0	9.42s
✅ TYPESCRIPT	prettier	38	1	0	2.38s

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[codecov]

Codecov Report

Attention: Patch coverage is 20.28812% with 664 lines in your changes missing coverage. Please review.

Project coverage is 94.93%. Comparing base (373d404) to head (035f3a1).

Files with missing lines	Patch %	Lines
...g/src/language/graphical-editor/ast-parser/call.ts	5.00%	171 Missing ⚠️
...uage/graphical-editor/graphical-editor-provider.ts	30.66%	104 Missing ⚠️
...src/language/graphical-editor/ast-parser/parser.ts	14.28%	96 Missing ⚠️
.../language/graphical-editor/ast-parser/statement.ts	10.38%	69 Missing ⚠️
...e/graphical-editor/ast-parser/tools/debug-utils.ts	9.43%	48 Missing ⚠️
...language/graphical-editor/ast-parser/expression.ts	15.38%	44 Missing ⚠️
...rc/language/graphical-editor/ast-parser/segment.ts	14.28%	36 Missing ⚠️
...g/src/language/graphical-editor/ast-parser/edge.ts	37.50%	25 Missing ⚠️
...afe-ds-lang/src/language/graphical-editor/types.ts	37.50%	15 Missing ⚠️
...c/language/graphical-editor/ast-parser/argument.ts	27.77%	13 Missing ⚠️
... and 5 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1317      +/-   ##
==========================================
- Coverage   99.72%   94.93%   -4.80%     
==========================================
  Files         119      134      +15     
  Lines       12955    13788     +833     
  Branches     4240     4248       +8     
==========================================
+ Hits        12920    13089     +169     
- Misses         35      698     +663     
- Partials        0        1       +1     

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[GideonKoenig]

@lars-reimann There seems to be an issue with the current implementation of the graphical-editor service in the language server. During the initialization of the class, I store references to various services (e.g. the IndexManager). This pattern was taken from other ServiceProviders.
However, it seems, that during some RPCs some of these stored references are undefined.

2025-01-21 23:23:24.719 [error] Error: Request graphical-editor/getBuildins failed with message: Cannot read properties of undefined (reading 'IndexManager')

        at handleResponse (c:\Users\Gideon\projects\safe-ds-pull-requests\packages\safe-ds-vscode\dist\extension\mainClient.cjs:2120:40)
	at handleMessage (c:\Users\Gideon\projects\safe-ds-pull-requests\packages\safe-ds-vscode\dist\extension\mainClient.cjs:1930:11)
	at processMessageQueue (c:\Users\Gideon\projects\safe-ds-pull-requests\packages\safe-ds-vscode\dist\extension\mainClient.cjs:1945:13)
	at Immediate.<anonymous> (c:\Users\Gideon\projects\safe-ds-pull-requests\packages\safe-ds-vscode\dist\extension\mainClient.cjs:1921:11)
	at process.processImmediate (node:internal/timers:483:21)
	at process.callbackTrampoline (node:internal/async_hooks:130:17)

I assume, that I made a mistake during the registration of the service (in @safe-ds/lang/safe-ds-module.ts).

[GideonKoenig]

@lars-reimann
The linting error is a misconfiguration of StyleLinter.
The unknown at-rules in the css file are part of tailwind. Everything I can find online suggests configuration adjustments to ignore these unknown at rules:

• tailwind
• apply
• layers

[GideonKoenig]

Bug 3
The section headers in the sidebar have been translated.
Both the smaller changes (changing the color of the code sample, or just removing it altogether) can be dealt with later.