Organize tests by type and function - #99

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`promkit-widgets` (lib) generated 5 warnings

function `place_cursor_from` is never used

function `is_previous` is never used

function `is_next` is never used

function `projection_viewport` is never used

struct `ProjectionViewport` is never constructed

this if-then-else expression assigns a bool literal

this `if` has identical blocks

redundant field names in struct initialization

redundant field names in struct initialization

redundant field names in struct initialization

redundant field names in struct initialization

redundant field names in struct initialization

redundant field names in struct initialization

redundant field names in struct initialization

redundant field names in struct initialization

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/