feat: add useProperSingularization option for model name singularization

[ballistic-booger]

• add rule-based Singularize to StringExtensions (policies -> Policy, statuses -> Status, devices -> Device)
• thread new opt-in flag through ToModelName callers in DataClassesGen, ModelsGen, CommonGen, DbDriver, EnumDbDriver
• expose useProperSingularization in RawOptions/Options, default false to keep legacy TrimEnd('s') behavior
• add ModelNameTests covering both legacy and proper singularization paths
• document the option in README and docs/03_Usage.md
• regenerate example request.json/request.message fixtures with the new option field

[github-actions]

Release Assistant - Passed

All requirements satisfied.

Release Information:

• Type: minor

This PR is ready to merge.

[ballistic-booger]

Not sure what the release-assistant/requirements failure is referring to, when I open it up it looks like it passed.

[doron050]

Not sure what the release-assistant/requirements failure is referring to, when I open it up it looks like it passed.

It refers to this #440 (comment)

I added it so the release process will be easier

Tldr - add a label to the PR that represents your change type and this will be calculated into the next release version

[ballistic-booger]

Not sure what the release-assistant/requirements failure is referring to, when I open it up it looks like it passed.

It refers to this #440 (comment)

I added it so the release process will be easier

Tldr - add a label to the PR that represents your change type and this will be calculated into the next release version

Thanks for clarifying. I tried to add the label, but it seems like I don't have the permissions to do so. Neither the UI or gh let's me.

❯ gh pr edit 440 --repo DaredevilOSS/sqlc-gen-csharp --add-label minor
GraphQL: ballistic-booger does not have the correct permissions to execute AddLabelsToLabelable (addLabelsToLabelable)

[doron050]

gh pr edit 440 --repo DaredevilOSS/sqlc-gen-csharp --add-label minor
GraphQL: ballistic-booger does not have the correct permissions to execute AddLabelsToLabelable (addLabelsToLabelable)

Yes, you can't add labels from outside the repo... I didn't know about this limitation. I'll simply add the labels to PR's don't worry about it