add 3471 solution

[lyxuansang91]

No description provided.

[Copilot]

Pull request overview

Adds documentation for LeetCode problem 3471 to this algorithms write-up repository, and updates the repo indices to include the new entry.

Changes:

• Added a new Easy solution folder for 3471. Find the Largest Almost Missing Integer, including solution.md (Go + Rust) and description.md.
• Updated README.md and SUMMARY.md to index the new problem.
• Updated CLAUDE.md to reflect the new total problem count.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
SUMMARY.md	Adds the 3471 entry to the Easy table of contents.
README.md	Updates total/Easy counts and adds the 3471 row to the Easy solutions table.
Easy/3471.Find-the-Largest-Almost-Missing-Integer/solution.md	New solution write-up with complexity + Go/Rust implementations.
Easy/3471.Find-the-Largest-Almost-Missing-Integer/description.md	New problem statement/constraints/examples for 3471.
CLAUDE.md	Updates the documented total solutions count to 199.

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