Issue #3486180: Does not support langcode url prefixes more complex than 2...

Issue #3486180: Does not support langcode url prefixes more complex than 2 letters (e.g. zh-hans, zh-hant, haw)

Closes #3486180

This includes the work in !8 (merged), mainly so the pipeline jobs pass.

changed the description

added 1 commit

• 563d069a - Comment tweaks.

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added 11 commits

• 0d36341f - 1 earlier commit
• 44c387b8 - Issue #3476383: Add ignored errors to PHPStan config
• f7d174f9 - Issue #3476383: Declare strict types in unit tests
• 4777d6fd - Issue #3476383: Sorting use statements
• 89e0fa09 - Issue #3465682: Use deprecation layer for path prefix service injection
• 7dff02bd - Issue #3465682: Add PHPUnit output
• b7cf1d19 - Issue #3465682: Change user creation in tests
• b0fc31d1 - Issue #3465682: Change user creation in tests
• 917e724b - Issue: #3465682: Side-step a DI difficulty by obviating need to override __construct().
• 45e843e9 - Issue: #3476383 Linting.
• 5bf5f182 - Merge remote-tracking branch...

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added 2 commits

• 2e812d52 - 1 commit from branch project:1.0.x
• f85cce9d - 3486180: Resolved conflicts with 1.0.x

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added 1 commit

• def06430 - 3486180: Removed PathUtility after resolving conflicts

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resolved all threads