[Nitro CLI] Add --exclude-by-tag option to compose command

[madiganz]

Previously exclude-by-tag could only set on the settings command, which can only be run after an archive file has already been created. This leads to a problem if all sources need to be merged without a specific tag. This change updates the nitro compose options to support excluding by tag.

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[Copilot]

Pull request overview

This PR adds support for the --exclude-by-tag option to the fusion compose command, enabling users to exclude schema elements by tag during composition without needing to create an archive first and then use the settings command.

Changes:

• Added a new ExcludeTagListOption class for handling the --exclude-by-tag command-line option
• Modified FusionComposeCommand to accept and process the exclude-by-tag option during composition
• Added comprehensive test coverage with test resources demonstrating tag exclusion functionality

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
ExcludeTagListOption.cs	New option class defining the --exclude-by-tag command-line argument for accepting a list of tags to exclude
FusionComposeCommand.cs	Updated compose command to retrieve, pass through, and apply the exclude-by-tag option throughout all execution paths (standard, watch mode, and file watching)
FusionComposeCommandTests.cs	Added test case Compose_Valid_ExcludeTag to verify the exclude-by-tag functionality works correctly
source-schema-1.graphqls	Test resource containing a GraphQL schema with fields tagged with "exclude-1" and "exclude-2"
source-schema-1-settings.json	Configuration for the first test schema
source-schema-2.graphqls	Test resource containing a second GraphQL schema without tagged fields
source-schema-2-settings.json	Configuration for the second test schema
composite-schema.graphqls	Expected result showing that fields with "exclude-1" and "exclude-2" tags are excluded from composition

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