Improve CTKeyedTree Implementation, Tests, Workflows & Readme

[Alokzh]

Summary:

This pull request significantly enhances the CTKeyedTree implementation. The changes include a massively expanded API, critical bug fixes to recursive methods, improved test coverage, updated Readme & CI workflows

Changes:

• Expanded API: Added rich set of collection methods (select:, collect:) and tree queries (depth, allPaths, asDictionary) etc
• Critical Bug Fixes: Corrected the core recursion logic in subtrees, fixing failures in all dependent methods
• Improved Quality: Increased test coverage & updated the README.md with better examples

[coveralls]

Pull Request Test Coverage Report for Build 17398400907

Details

• 325 of 501 (64.87%) changed or added relevant lines in 1 file are covered.
• 9 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-25.0%) to 64.935%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/Containers-KeyedTree/CTKeyedTree.class.st	325	501	64.87%

Files with Coverage Reduction	New Missed Lines	%
src/Containers-KeyedTree/CTKeyedTree.class.st	9	64.94%

Totals
Change from base Build 14791748778:	-25.0%
Covered Lines:	350
Relevant Lines:	539

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 17398400907

Details

• 325 of 501 (64.87%) changed or added relevant lines in 1 file are covered.
• 9 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-25.0%) to 64.935%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/Containers-KeyedTree/CTKeyedTree.class.st	325	501	64.87%

Files with Coverage Reduction	New Missed Lines	%
src/Containers-KeyedTree/CTKeyedTree.class.st	9	64.94%

Totals
Change from base Build 14791748778:	-25.0%
Covered Lines:	350
Relevant Lines:	539

---

💛 - Coveralls