feat(ts-interface-generator): bundle TypeScript as direct dependency, allow usage in TS7 projects

[akudev]

Remove the typescript peer dependency (>=5.2.0 <7.0.0) and instead bundle TypeScript 6.0.3 as a direct dependency, matching the pattern already used by @ui5/dts-generator. This decouples the tool from the user's TypeScript version, allowing it to work in projects using any version including TypeScript 7.

Additional fixes included:

• Fall back to the internal pathsBasePath compiler option when baseUrl is not set (baseUrl is removed in TS7, but TS6 populates pathsBasePath when paths is specified without baseUrl)
• Filter diagnostic codes 5023/5025 (unknown compiler option) so that TS7-era tsconfig options don't produce noise from the bundled TS6
• Replace throw with log.debug for unexpected diagnostic codes in reportWatchStatusChanged to avoid crashes on unforeseen diagnostics

[Copilot]

Copilot review overview

🟡 Changes recommended

Run-once diagnostics remain unsuppressed, the key path fallback lacks coverage, and the lockfile contains unrelated dependency churn.

Review effort: Balanced
Findings: 3 · 1

Open (4)

• Add coverage for paths mapping without baseUrl · New
• Install the diagnostic reporter in both watch and run-once modes · New
• Regenerate the lockfile without unrelated transitive downgrades · New
• Correct the claim that the dependency is absent from consumer trees · New

What changed in this PR

Moves the interface generator to an internal TypeScript 6 dependency for compatibility with TypeScript 7 projects.

Changes:

• Adds TypeScript 6.0.3 as a direct dependency.
• Adds TS7-compatible path handling and diagnostic behavior.
• Documents the migration and release impact.

File	Description
package.json	Adds the direct TypeScript dependency.
pnpm-lock.yaml	Updates dependency resolution.
typeScriptEnvironment.ts	Filters diagnostics and avoids watch-status crashes.
generateTSInterfacesAPI.ts	Adds pathsBasePath fallback.
docs/​TS7.md	Documents the migration strategy.
.changeset/​bundle-typescript6.md	Records the minor release.

Files not reviewed (1)

• pnpm-lock.yaml: Generated file

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[Copilot]

Copilot review overview

🟡 Changes recommended

Run-once mode now suppresses all compiler diagnostics, and the new fixture does not validate the fallback it targets.

Review effort: Balanced
Findings: 1 · 1 · 2

Open (4)

• Delegate non-filtered diagnostics to the default reporter · New
• Use a relative target to test the pathsBasePath fallback · New
• Correct the TypeScript 7.0.2 release timeline · New
• Remove duplicate TypeScript devDependency declaration · New

Resolved since last review (4)

• Regenerate the lockfile without unrelated transitive downgrades
• Install the diagnostic reporter in both watch and run-once modes
• Add coverage for paths mapping without baseUrl
• Correct the claim that the dependency is absent from consumer trees

Files not reviewed (1)

• pnpm-lock.yaml: Generated file

[Copilot]

Copilot review overview

🟡 Changes recommended

Run-once diagnostics lose essential source locations and codes, making CI failures difficult to diagnose.

Review effort: Balanced
Findings: 1 · 1

Open (2)

• Preserve diagnostic code and source location in CI output · New
• Use the correct TypeScript 7.0.2 release month · New

Resolved since last review (4)

• Delegate non-filtered diagnostics to the default reporter
• Use a relative target to test the pathsBasePath fallback
• Remove duplicate TypeScript devDependency declaration
• Correct the TypeScript 7.0.2 release timeline

Files not reviewed (1)

• pnpm-lock.yaml: Generated file

[Copilot]

Copilot review overview

🟡 Changes recommended

Run-once compiler errors can be hidden by the supported error-only log level, and diagnostic filtering lacks regression coverage.

Review effort: Balanced
Findings: 2 · 1

Open (3)

• Add regression test for diagnostic filtering · New
• Preserve diagnostic code and source location in CI output
• Use the correct TypeScript 7.0.2 release month

Files not reviewed (1)

• pnpm-lock.yaml: Generated file