Closes #7240: 3.19 - Beacon Insertion

[Miraeld]

Description

Fixes #7240
Adds the beacon insertion to the page when no data is available in the db.

Type of change

• New feature (non-breaking change which adds functionality).

Detailed scenario

Refer to issue

Technical description

Documentation

Service Provider Addition:

Added preload_fonts_factory to the list of performance hints in ServiceProvider.php.
Registered the preload_fonts_factory in the register method of ServiceProvider.php.
Created a new ServiceProvider class for the preload fonts feature in PreloadFonts/ServiceProvider.php.
Context Implementation:

Added a new Context class implementing ContextInterface to manage the context for preload fonts in PreloadFonts/Context/Context.php.
Factory Setup:

Introduced a Factory class implementing FactoryInterface to handle the creation of preload fonts-related objects in PreloadFonts/Factory.php.
Frontend Controller:

Added a Controller class implementing ControllerInterface to manage frontend optimizations for preload fonts in PreloadFonts/Frontend/Controller.php.
None

Risks

None

Mandatory Checklist

Code validation

• I validated all the Acceptance Criteria. If possible, provide screenshots or videos.
• I triggered all changed lines of code at least once without new errors/warnings/notices.
• I implemented built-in tests to cover the new/changed code.

Code style

• I wrote a self-explanatory code about what it does.
• I protected entry points against unexpected inputs.
• I did not introduce unnecessary complexity.
• Output messages (errors, notices, logs) are explicit enough for users to understand the issue and are actionnable.

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
❌ -0.27% (target: -0.10%)	✅ 58.46% (target: 50.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (e78c0e0)	38888	17199	44.23%
Head commit (cb7b9f2)	39257 (+369)	17258 (+59)	43.96% (-0.27%)

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 (#7302)	65	38	58.46%

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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