Add basic project view management

[zwick]

Summary

Adds basic ProjectV2 view lifecycle support to the consolidated Projects tools: list/get views plus create/update/delete with name, layout, and filter. Create supports visible fields by database ID or case-insensitive field name.

Why

Fixes #2954.

What changed

• Added list_project_views and get_project_view with normalized output, pagination, and project-content IFC labels.
• Added create_project_view, update_project_view, and delete_project_view; create uses the public REST endpoint and can resolve visible_field_names to the required database IDs.
• Verify update/delete view ownership against the requested owner and project before mutation.
• Added focused lifecycle tests, tool snapshots, Projects instructions, and generated README docs.

MCP impact

• No tool or API changes
• Tool schema or behavior changed - extends the existing consolidated Projects tools with five methods.
• New tool added

Prompts tested (tool changes only)

• "List the views in my user project."
• "Create a table view filtered to status:Todo with Status and Assignees visible."
• "Get the new view, rename it, switch it to board layout, and filter to assignee:@me."
• "Clear the view filter, then delete the view and list the views again."

Validated through the built stdio MCP server against the public APIs without preview headers, including visible_field_names resolution, ownership-mismatch rejection, and final cleanup/read-back.

Security / limits

• No security or limits impact
• Auth / permissions considered - existing read:project and project scopes are unchanged, and mutations verify the view belongs to the requested project.
• Data exposure, filtering, or token/size limits considered - read results use project-content IFC labels and list pagination remains capped at 50.

Tool renaming

• I am renaming tools as part of this PR (e.g. a part of a consolidation effort)
  • I have added the new tool aliases in deprecated_tool_aliases.go
• I am not renaming tools as part of this PR

Lint & tests

• Linted locally with ./script/lint
• Tested locally with ./script/test

Docs

• Not needed
• Updated (README / docs / examples)

[Copilot]

Pull request overview

Adds complete basic ProjectV2 view lifecycle support to the consolidated Projects tools.

Changes:

• Adds list/get/create/update/delete view operations with pagination and IFC labeling.
• Supports layouts, filters, visible fields, and ownership verification.
• Adds tests, snapshots, instructions, and generated documentation.

Show a summary per file

File	Description
README.md	Documents view parameters.
pkg/github/toolset_instructions.go	Adds view workflow guidance.
pkg/github/projects.go	Implements view lifecycle operations.
pkg/github/projects_v2_test.go	Tests view behavior and authorization.
pkg/github/projects_test.go	Verifies updated tool schemas.
pkg/github/minimal_types.go	Adds normalized view output type.
pkg/github/__toolsnaps__/projects_write.snap	Updates write schema snapshot.
pkg/github/__toolsnaps__/projects_list.snap	Updates list schema snapshot.
pkg/github/__toolsnaps__/projects_get.snap	Updates get schema snapshot.

Review details

• Files reviewed: 9/9 changed files
• Comments generated: 0
• Review effort level: Medium