fix: match whole command text; refresh readme

[Markeli]

Summary

• Fix: a command matched any message that merely started with its CommandText, so /pinger went to the /ping handler. The command text must now be followed by the end of the message, whitespace or @ (/ping now, /ping@MyBot). The longest matching CommandText wins, and matching is ordinal. Released as 3.0.1.
• Docs: README features now cover HTTP proxy, queue persistence and multi-step commands as a state machine. Added "How it differs" and a Roadmap pointing to the v4 milestone.

Tests

• New tests for whole-word matching, longest-match selection and cached-state routing.
• 113 tests pass on net10.0. net9.0 wasn't run locally because the runtime isn't installed, so CI covers it.

🤖 Generated with Claude Code

[github-actions]

Release check

Package	Version	On merge
Curiosus.TelegramBot	3.0.1	🚀 released as 3.0.1

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