feat(Dynamics.TopologicalEntropy.Semiconj): topological entropy and semiconjugacies

[D-Thomine]

Fourth PR in a sequence to implement the notion of topological entropy for maps using Bowen-Dinaburg's formalism. This file deals with the entropy of two systems related by a semiconjugacy.

• Dynamical uniformities
• Topological entropy via covers
• Topological entropy via nets
• Behaviour under semiconjugacy
• Behaviour for subsets and unions
• Behaviour under products
• Full shift

There is only one new file, Dynamics.TopologicalEntropy.Semiconj, which is quite short (200 lines including the documentation), and no other modification. I must say I am quite pleased by coverEntropy_image.

Paging @pitmonticone @sgouezel

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[github-actions]

PR summary cca97407fa

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference
Mathlib.Dynamics.TopologicalEntropy.Semiconj	1393

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Declarations diff

+ IsDynCoverOf.image
+ IsDynCoverOf.preimage
+ coverEntropyEntourage_image_le
+ coverEntropyInfEntourage_image_le
+ coverEntropyInf_image
+ coverEntropyInf_image_le_of_uniformContinuous
+ coverEntropy_image
+ coverEntropy_image_le_of_uniformContinuous
+ coverEntropy_restrict
+ coverMincard_image_le
+ justifies
+ le_coverEntropyEntourage_image
+ le_coverEntropyInfEntourage_image
+ le_coverMincard_image

You can run this locally as follows

## summary with just the declaration names:
./scripts/declarations_diff.sh <optional_commit>

## more verbose report:
./scripts/declarations_diff.sh long <optional_commit>

The doc-module for script/declarations_diff.sh contains some details about this script.