Resolve #2976861 "11 add an entity links handler to provide menu linkstasksactions for entity types"

Closes #2976861

added 2 commits

• fa7e1003 - Fixed coding style.
• 61c080b9 - Fixed missing declare strict.

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added 1 commit

• 4787750a - Added return types.

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added 1 commit

• 9a1d2eec - Added return types.

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added 1 commit

• a2675c6a - Added version history task link to content entity links provider.

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added 3 commits

• bcb03008 - Added test for node links preserving their plugin IDs.
• 9e387606 - Converted node_type entity to use an entity links handler, while preserving plugin IDs for BC.
• 22aeb3e8 - Converted node entity to use an entity links handler, while preserving plugin IDs for BC.

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added 5 commits

• 97ab397f - Added return types.
• 84562c11 - Added version history task link to content entity links provider.
• 05158c37 - Added test for node links preserving their plugin IDs.
• 9a52470b - Converted node_type entity to use an entity links handler, while preserving plugin IDs for BC.
• 62c1c61b - Converted node entity to use an entity links handler, while preserving plugin IDs for BC.

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added 2 commits

• cdae689f - Converted node_type entity to use an entity links handler, while preserving plugin IDs for BC.
• ff423d81 - Converted node entity to use an entity links handler, while preserving plugin IDs for BC.

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