[Merged by Bors] - feat: introduce ENat.card, and use it in place of PartENat.card

[kim-em]

No description provided.

[github-actions]

PR summary b724d2f619

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference

---

Declarations diff

+ _root_.Cardinal.natCast_eq_toENat_iff
+ _root_.Cardinal.natCast_le_toENat_iff
+ _root_.Cardinal.natCast_lt_toENat_iff
+ _root_.Cardinal.toENat_eq_natCast_iff
+ _root_.Cardinal.toENat_le_natCast_iff
+ _root_.Cardinal.toENat_lt_natCast_iff
+ card
+ card_congr
+ card_eq_coe_fintype_card
+ card_eq_coe_natCard
+ card_eq_top_of_infinite
+ card_eq_zero_iff_empty
+ card_image_of_injOn
+ card_image_of_injective
+ card_le_one_iff_subsingleton
+ card_sum
+ one_lt_card_iff_nontrivial
+ toENat_congr
+ toENat_eq_iff_of_le_aleph0
+ toENat_le_iff_of_le_aleph0
+ toENat_le_iff_of_lt_aleph0
+-+ card_plift
+-+ card_ulift

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.

---

Increase in tech debt: (relative, absolute) = (1.00, 0.02)

Current number	Change	Type
56	1	disabled deprecation lints

Current commit b724d2f619
Reference commit eb9d9b39a4

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).

[ocfnash]

Thanks so much for doing this!

bors d+

[mathlib-bors]

✌️ kim-em can now approve this pull request. To approve and merge a pull request, simply reply with bors r+. More detailed instructions are available here.

[kim-em]

bors merge

[mathlib-bors]

Pull request successfully merged into master.

Build succeeded:

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