[features]: add fix command to autofix break issues....

[Sunrisepeak]

Features Describe | 功能描述

xlings fix mongodb-status-14-issues

• https://stackoverflow.com/questions/64608581/mongodb-code-exited-status-14-failed-but-not-any-clear-errors

Usage Scenario | 需求背景/使用场景

Maybe Solutions | 可能的实现方案 - (if you are developer)

Additional context | 额外补充

[speak-agent]

The autofix capability shipped as xlings self doctor --fix (with --dry-run / --all): a detect → repair → re-detect convergence loop over xlings-domain breakage — missing/orphan shims, dangling binding edges, incoherent releases, dangling sysroot links (src/core/xself/doctor.cppm + repair.cppm, e2e tests/e2e/doctor_fix_convergence_test.sh). A named-runbook fix <known-issue> catalog for third-party software (the mongodb example) was not adopted; that idea is recorded in the residual list of #517 (a runbook-style package category or agent skill, if ever pursued). Closing as delivered in doctor form.