Improve developer experience with consistent formatting

[martin-fleck-at]

• Add format command for consistency with lint

• Add spell checker recommendation

• Specify consistent tab width of 3 spaces

• Fix typos and markdown formatting issues

• Apply consistent format on all files and organize imports -- Organize all imports by search&replace the same string in all files -- Run 'format' on repository

[github-actions[bot]]

Unit Test Results

    3 files  ±0    30 suites  ±0   2m 21s :stopwatch: -6s   68 tests ±0    68 :heavy_check_mark: ±0  0 :zzz: ±0  0 :x: ±0  207 runs  ±0  207 :heavy_check_mark: ±0  0 :zzz: ±0  0 :x: ±0 

Results for commit ad9ee177. ± Comparison against base commit 9afb1c32.

This pull request removes 1 and adds 1 tests. Note that renamed tests count towards both.

``` CrossModel language Diagram Diagram with nodes and edges Simple file for diagram and edges, but descirption and name coming last ‑ CrossModel language Diagram Diagram with nodes and edges Simple file for diagram and edges, but descirption and name coming last ``` ``` CrossModel language Diagram Diagram with nodes and edges Simple file for diagram and edges, but description and name coming last ‑ CrossModel language Diagram Diagram with nodes and edges Simple file for diagram and edges, but description and name coming last ```

:recycle: This comment has been updated with latest results.