refactor: extract unicode-ellipsis into its own crate

Description

A description of the change, what it does, and why it was made. If relevant (such as any change that modifies the UI), please provide screenshots of the changes:

Extract https://github.com/ClementTsang/unicode-ellipsis into its own separate crate.

Issue

If applicable, what issue does this address?

Closes: #

Testing

If relevant, please state how this was tested. All changes must be tested to work:

If this is a code change, please also indicate which platforms were tested:

[ ] Windows
[ ] macOS
[ ] Linux

Checklist

If relevant, ensure the following have been met:

[ ] Areas your change affects have been linted using rustfmt (cargo fmt)
[ ] The change has been tested and doesn't appear to cause any unintended breakage
[ ] Documentation has been added/updated if needed (README.md, help menu, doc pages, etc.)
[ ] The pull request passes the provided CI pipeline
[ ] There are no merge conflicts
[ ] If relevant, new tests were added (don't worry too much about coverage)

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 55.27%. Comparing base (d515c03) to head (e77e7f6).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1465 +/- ## ========================================== - Coverage 55.84% 55.27% -0.57% ========================================== Files 99 99 Lines 18191 17940 -251 ========================================== - Hits 10158 9917 -241 + Misses 8033 8023 -10 ``` | [Flag](https://app.codecov.io/gh/ClementTsang/bottom/pull/1465/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Clement+Tsang) | Coverage Δ | | |---|---|---| | [macos-12](https://app.codecov.io/gh/ClementTsang/bottom/pull/1465/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Clement+Tsang) | `38.46% <93.33%> (-0.85%)` | :arrow_down: | | [ubuntu-latest](https://app.codecov.io/gh/ClementTsang/bottom/pull/1465/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Clement+Tsang) | `57.89% <100.00%> (-0.56%)` | :arrow_down: | | [windows-2019](https://app.codecov.io/gh/ClementTsang/bottom/pull/1465/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Clement+Tsang) | `38.63% <93.33%> (-0.87%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Clement+Tsang#carryforward-flags-in-the-pull-request-comment) to find out more.

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ClementTsang / bottom