feat: add clangd configuration file

[daantimmer]

No description provided.

[github-actions]

🦙 MegaLinter status: ⚠️ WARNING

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ ACTION	actionlint	5		0	0.05s
✅ CPP	clang-format	15	2	0	0.28s
✅ DOCKERFILE	hadolint	1		0	0.31s
✅ JSON	jsonlint	7		0	0.23s
✅ JSON	prettier	7	2	0	0.65s
⚠️ MARKDOWN	markdownlint	6	1	7	1.09s
⚠️ MARKDOWN	markdown-link-check	6		1	39.6s
✅ MARKDOWN	markdown-table-formatter	6	1	0	0.31s
✅ REPOSITORY	checkov	yes		no	26.78s
✅ REPOSITORY	git_diff	yes		no	0.29s
✅ REPOSITORY	grype	yes		no	21.57s
✅ REPOSITORY	secretlint	yes		no	46.84s
✅ REPOSITORY	trivy	yes		no	4.99s
✅ REPOSITORY	trivy-sbom	yes		no	3.82s
✅ REPOSITORY	trufflehog	yes		no	9.73s
⚠️ SPELL	lychee	29		2	72.72s
✅ YAML	prettier	7	1	0	0.8s
✅ YAML	v8r	7		0	5.89s
✅ YAML	yamllint	7		0	0.82s

See detailed report in MegaLinter reports

MegaLinter is graciously provided by