refactor(@schematics/angular): remove third-party typescript copy

[alan-agius4]

The typescript package is now smaller and the tsserver file no longer bundles typescript but imports it directly, which makes the 3rd party copy redundant.

[gemini-code-assist]

Code Review

This pull request removes the vendored TypeScript dependency from the third_party/typescript directory and replaces it with a direct dependency on the typescript package (version 6.0.3). The changes include updating Bazel build configurations, package.json, and numerous import statements across the schematics package. Feedback was provided regarding the inconsistent import style of the typescript package, suggesting the use of namespace imports (import * as ts) throughout the codebase for better consistency and compatibility.

[alan-agius4]

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

• main: c6dd57a

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