feat(Geometry/Convex/Cone): Minor additions to pointed cones

[martinwintermath]

Minor additions to pointed cones:

• PointedCone.ofSubmodule_le_ofSubmodule and PointedCone.ofSubmodule_lt_ofSubmodule
• PointedCone.hull_le_span as a short form of Submodule.span_le_restrictScalars R≥0 R s
• PointedCone.neg_ofSubmodule proving -(ofSubmodule S) = S

In preparation for #36605.

Co-authored by: Artie Khovanov

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[github-actions]

PR summary c290b55c6e

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

+ hull_le_span
+ neg_ofSubmodule
+ ofSubmodule_le_ofSubmodule
+ ofSubmodule_lt_ofSubmodule

You can run this locally as follows

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

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

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

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Increase in tech debt: (relative, absolute) = (3.00, 0.00)

Current number	Change	Type
6756	3	backward.isDefEq.respectTransparency

Current commit 55616981e6
Reference commit c290b55c6e

You can run this locally as

./scripts/reporting/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).