Update wallet repository metadata

[JeremyZeng77]

Problem

This repository now lives under BitgesellOfficial/bitgesell-wallet, but package.json still points bugs and repository metadata at the old epexa/bitgesell-wallet path. The README also contains a non-ASCII lookalike character in "cross-platform" and stylized quotes around the jsbgl link text.

Summary

• Update package metadata to the current GitHub organization/repository.
• Normalize README wording for "cross-platform" and jsbgl link text.

Verification

• git diff --check
• Parsed package.json with Node to confirm valid JSON.

Related Bitgesell bounty/improvement program: BitgesellOfficial/bitgesell#81

Payment if approved: USDT TRC20 TWupTAoFjxR2VmqUUvzhfmUwXVZR6Kvz1Y.

[MyTH-zyxeon]

Maintainer triage for the Bitgesell improvement queue (#81): this is a small docs/package-metadata cleanup with overlap against the newer #10, so I would review it as a competing/smaller variant rather than merge both blindly.

What I verified from the PR diff:

• README.md replaces the non-ASCII lookalike in сross-platform with normal ASCII cross-platform.
• README.md normalizes the jsbgl link text by removing the curly quotes, but it still points at bitaps-com/jsbgl.
• package.json updates bugs and repository metadata from epexa/bitgesell-wallet to BitgesellOfficial/bitgesell-wallet.

Merge/deconfliction notes:

• PR docs: point wallet links to official repos #10 appears to cover the same package.json metadata change and additionally points README jsbgl links at BitgesellOfficial/jsbgl.
• This PR has the unique ASCII cross-platform cleanup that docs: point wallet links to official repos #10 does not include.
• Best maintainer path is likely to combine the unique README typo fix from this PR with the more complete official-link update from docs: point wallet links to official repos #10, instead of accepting both independently.

I did not run the wallet locally in this pass, and I am not making a payout claim from this review note.