fix(api): update TON Center v2 repository references to the C++ implementation

[ATrump]

closes #2156

Update all references for API/v2 in the documentation from the Python implementation to the C++ implementation.

From: https://github.com/toncenter/ton-http-api
To: https://github.com/toncenter/ton-http-api-cpp

UPD: keep the old link(for Python) as an alternative(for CPP) for a while. It will be deprecated later.

Summary by CodeRabbit

Documentation

• Updated TON Center API v2 documentation links to reference the C++ implementation repository for setup and deployment instructions.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: ca18d06a-7b05-402e-b4b0-5e4ccf8adac7

📥 Commits

Reviewing files that changed from the base of the PR and between 916e7ef and 9ba538d.

📒 Files selected for processing (2)

• ecosystem/api/overview.mdx
• ecosystem/api/toncenter/v2/overview.mdx

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📝 Walkthrough

Walkthrough

This pull request migrates TON Center API v2 documentation from references to the Python implementation (ton-http-api) to the newer C++ implementation (ton-http-api-cpp). Two documentation files are updated: the main API overview and the self-hosted setup guide.

Changes

TON Center API v2 Documentation Migration to C++

Layer / File(s)	Summary
TON Center v2 reference links migration ecosystem/api/overview.mdx, ecosystem/api/toncenter/v2/overview.mdx	API overview reference links and self-hosted setup instructions repointed from the Python ton-http-api repository to the C++-based ton-http-api-cpp repository. The shared etc-v2-src reference now targets C++ deploy instructions, with Python reference preserved as a direct link.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Suggested reviewers

• tsivarev
• aigerimu

Poem

🐰 From Python old to C++ bright,
TON Center v2 takes its flight,
References refreshed with careful grace,
New implementations find their place! ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: updating TON Center v2 repository references from Python to C++ implementation.
Linked Issues check	✅ Passed	Changes successfully update API/v2 documentation references from ton-http-api (Python) to ton-http-api-cpp (C++) across two files, meeting the objective in issue #2156.
Out of Scope Changes check	✅ Passed	All changes are directly related to updating TON Center v2 API documentation references as specified in issue #2156; no out-of-scope modifications detected.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch migrate-to-ton-http-api-cpp

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[albertoblue87-netizen]

Done

[albertoblue87-netizen]

Done

[github-actions]

Thanks for the update in ecosystem/api/overview.mdx; there’s one inline suggestion to keep the reference wording neutral, so please apply the inline suggestion.

[github-actions]

[HIGH] Subjective “recommended” label in reference entry

The reference list entry for TON Center v2 currently reads “TON Center v2 (C++, newer, recommended) …”, which introduces a subjective recommendation and marketing-style phrasing without explicit, measurable criteria. The extended style guide bans promotional or vague evaluative adjectives such as “recommended” in technical content, requiring strictly factual, task-focused language. This wording appears directly in the changed line, so the issue is fully within the PR diff. Keeping the entry factual avoids implying endorsement or preference beyond what the documentation can justify objectively.

Suggested change

- [TON Center v2 (C++, newer, recommended) source and deploy instructions][etc-v2-src]

Please leave a reaction 👍/👎 to this suggestion to improve future reviews for everyone!