feat(#74): Rename Xmir to Eo

[volodya-lombrozo]

Rename Xmir to Eo

Closes: #74

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PR-Codex overview

Focus of this PR:

This PR focuses on renaming the Xmir classes and objects to Eo in order to improve clarity and consistency in the codebase.

Detailed summary:

• Renamed Xmir classes and objects to Eo throughout the codebase.
• Updated imports and references to reflect the renaming.
• Updated test cases and assertions to use the new Eo names.
• Updated file names and paths related to Xmir to use Eo instead.
• Updated XML file names and references from xmir to eo.
• Updated directory names and references from xmir to eo.
• Updated method names and variables related to Xmir to use Eo instead.

The following files were skipped due to too many changes: src/test/java/org/eolang/jeo/EoObjectsTest.java

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[volodya-lombrozo]

@rultor merge

[rultor]

@rultor merge

@volodya-lombrozo OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor merge

@volodya-lombrozo Done! FYI, the full log is here (took me 2min)