feat(type-compiler): inline external library imports

[marcus-sa]

Summary of changes

This introduces a new configuration for the type compiler in tsconfig.json.

{
  "compilerOptions": {
    // ...
  },
  "deepkitTypeCompilerOptions": {
    "reflection": true,
    "inlineExternalLibraryImports": {
      "rxjs": true, // mark all imports to be inlined
      // or
      "rxjs": ["Observable", "Subject"] // mark selected imports to be inlined
    }
  }
}

Relinquishment of Rights

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• [x] I waive and relinquish all rights regarding this changes (including code, text, and images) to Deepkit UG (limited), Germany. This changes (including code, text, and images) are under MIT license without name attribution, copyright notice, and permission notice requirement.

[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (f67cf73) 83.91% compared to head (debd1d8) 77.38%.

:exclamation: Current head debd1d8 differs from pull request most recent head c926db5. Consider uploading reports for the commit c926db5 to get more accurate results

Files	Patch %	Lines
packages/injector/src/injector.ts	0.00%	1 Missing :warning:

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #517 +/- ## ========================================== - Coverage 83.91% 77.38% -6.54% ========================================== Files 51 147 +96 Lines 3084 18155 +15071 Branches 667 4821 +4154 ========================================== + Hits 2588 14049 +11461 - Misses 496 4106 +3610 ```

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