chore: release v0.2.6

[devin-ai-integration]

Summary

Patch release bump 0.2.5 → 0.2.6. Includes fixes merged since v0.2.5:

• #313 serialize SHELL env var mutation in completions tests
• #312 validate $SHELL before extracting shell name in completions
• #311 warn on config parse errors during auth login
• #310 handle IPv6 bracketed hosts in strip_ssh_port

Once merged, the release.yml workflow will automatically tag v0.2.6, build platform artifacts via cargo-dist, and publish a GitHub Release.

Link to Devin session: https://app.devin.ai/sessions/02dfe916725247d6955ba0d4a49460df
Requested by: @sachiniyer

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Summary by cubic

Release v0.2.6 to ship fixes for shell detection, SSH host parsing, and clearer auth warnings, plus more reliable completion tests.

• Bug Fixes
  • Serialize SHELL env var mutation in completions tests to prevent flakiness.
  • Validate $SHELL before extracting the shell name in completions.
  • Warn on config parse errors during auth login.
  • Handle IPv6 bracketed hosts in strip_ssh_port.

^{Written for commit db9999c. Summary will update on new commits.}

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[devin-ai-integration]

Original prompt from Sachin

Can you do a new CLI release

[devin-ai-integration]

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[devin-ai-integration]

✅ Devin Review: No Issues Found

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Skipping bot pull request creation because the queue is empty and this pull request is up to date with main.

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