[#2291] Support the '...' group for alphabetizing fragment spreads

[yoavsion]

Description

Adds a group type to the groups property of the alphabetize rule indicating where fragment spreads should be in a selection set.

Similarly to the '*' group, which stands for "everything else," the '...' stands for "all fragment spreads."

Fixes #2291

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

How Has This Been Tested?

Added the following unit tests, ran yarn test and verified that the error messages match the expected ones:

• should sort selections by group when ... is at the start
• should sort selections by group when ... is between
• should sort selections by group when ... is at the end

Checklist:

• I have followed the
  CONTRIBUTING doc and the
  style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests and linter rules pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

Further comments

When working on this change, the display name for a fragment spread was showing undefined <fragment name>, which was because there was no name mapping for that Kind — so I went ahead and added display names for all Kind values, and sorted the map.

[changeset-bot]

🦋 Changeset detected

Latest commit: b3d0b6f

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@graphql-eslint/eslint-plugin	Minor

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[yoavsion]

Added display name for all Kind enum values, and sorted the list