feat: add solutions for lc No.1417

[yanglbme]

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[Copilot]

Pull request overview

Unable to perform a proper PR review because the diff/changed-file context was not provided (and PR inline comments can’t be placed without knowing which files/lines were changed).

Changes (inferred from current repository contents for LC 1417):

• Adds/updates the solution package for 1417. Reformat The String, including multi-language reference implementations (e.g., Python/Java/C++/Go/TS/Rust).
• Adds/updates the problem writeups in README.md / README_EN.md under the 1417 solution directory.
• Likely updates the global solution indices (e.g., solution/README*.md, solution/CONTEST_README*.md) to include the 1417 entry.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
solution/1400-1499/1417.Reformat The String/README.md	Problem statement + Chinese explanation + code tabs for multiple languages
solution/1400-1499/1417.Reformat The String/README_EN.md	English version of the explanation + code tabs
solution/1400-1499/1417.Reformat The String/Solution.*	Language-specific implementations for LC 1417
solution/README.md / solution/README_EN.md	Likely index entry for 1417
solution/CONTEST_README.md / solution/CONTEST_README_EN.md	Likely contest index entry for 1417

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