fix(@angular/cli): rename mcp devserver tools to comply with naming spec

[cexbrayat]

PR Checklist

Please check to confirm your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/angular/angular-cli/blob/main/CONTRIBUTING.md#-commit-message-guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Other... Please describe:

What is the current behavior?

This fixes a warning about invalid characters in tool names as per the spec: https://modelcontextprotocol.io/specification/draft/server/tools#tool-names

2025-12-17 16:32:44.992 [warning] [server stderr] Tool name validation warning for "devserver/wait_for_build":
2025-12-17 16:32:44.992 [warning] [server stderr]   - Tool name contains invalid characters: "/"

What is the new behavior?

This change renames devserver/start, devserver/stop, and devserver/wait_for_build to devserver.start, devserver.stop, and devserver.wait_for_build respectively.

Does this PR introduce a breaking change?

• Yes
• No

Other information

[dgp1130]

This PR was merged into the repository. The changes were merged into the following branches:

• main: 18d74dd

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