[Merged by Bors] - refactor: move CategoryTheory.Category.Grpd to CategoryTheory.Groupoid.Grpd.Basic

[Jlh18]

Step one of several PRs, stemming from #29283

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[github-actions]

PR summary e640e39324

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference
Mathlib.CategoryTheory.Category.Grpd	-390
Mathlib.CategoryTheory.Groupoid.Grpd.Basic	390

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Declarations diff

No declarations were harmed in the making of this PR! 🐙

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).

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note: file Mathlib/CategoryTheory/Category/Grpd.lean` was renamed to `Mathlib/CategoryTheory/Groupoid/Grpd/Basic.lean without a module deprecation
Please create a follow-up pull request adding one. Thanks!

[Jlh18]

@dagurtomas Thank you for the suggestions. Here is the first PR just moving the Grpd file to Grpd.Basic

[mathlib4-merge-conflict-bot]

This pull request has conflicts, please merge master and resolve them.

[joelriou]

Thanks!

bors merge

[mathlib-bors]

Pull request successfully merged into master.

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