feat: constructible sets in the prime spectrum

[YaelDillies]

Provide tooling for manipulating constructible sets in the prime spectrum of a ring.

From GrowthInGroups (LeanCamCombi)

Co-authored-by: Andrew Yang

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[github-actions]

PR summary e80bbd46c4

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference
Mathlib.AlgebraicGeometry.PrimeSpectrum.ConstructibleSet (new file)	1468

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Declarations diff

+ ConstructibleSetData
+ degBound
+ map
+ map_comp
+ map_id
+ reduce
+ toSet
+ toSet_map
+ toSet_reduce

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.

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No changes to technical debt.

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).

[erdOne]

Do we still need this?