feat(RingTheory/Ideal/Quotient): add a canonical inclusion map

[BryceT233]

This is the second PR split from the larger PR #34936 to make the review process easier.

It introduces Submodule.powSmulQuotInclusion, which is the canonical inclusion from I ^ a • N ⧸ I ^ b • (I ^ a • N) to M ⧸ I ^ c • N where c = b + a, and provides auxiliary lemmas for it

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PR summary 570ff68990

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference

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Declarations diff

+ factorPow_powSmulQuotInclusion_comm
+ powSmulQuotInclusion
+ powSmulQuotInclusion_injective
+ powSmulQuotInclusion_range

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 scripts/declarations_diff.sh contains some details about this script.

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Increase in tech debt: (relative, absolute) = (1.00, 0.00)

Current number	Change	Type
13074	1	backward.isDefEq

Current commit c8f4fc044e
Reference commit 570ff68990

You can run this locally as

./scripts/technical-debt-metrics.sh pr_summary

• The relative value is the weighted sum of the differences with weight given by the inverse of the current value of the statistic.
• The absolute value is the relative value divided by the total sum of the inverses of the current values (i.e. the weighted average of the differences).