Group all dependabot updates in the same monthly PR

[elzik]

No description provided.

[Copilot]

Pull Request Overview

This PR configures Dependabot to group all dependency updates into a single monthly pull request instead of creating separate PRs for each dependency update.

• Adds a dependency grouping configuration to consolidate all updates
• Maintains the existing monthly update schedule
• Uses a wildcard pattern to include all dependencies in the group

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[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.00%	✅ ∅

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (b7b4641)	135	134	99.26%
Head commit (c5c6b87)	135 (+0)	134 (+0)	99.26% (+0.00%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#146)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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