chore: release 0.1.4

[code-yeongyu]

Release prep for 0.1.4. Only the version and CHANGELOG change.

Fixed since 0.1.3:

• fix: reject stray lines between file sections instead of silently dropping them #46 (fixes apply_patch silently drops a file section whose header is indented, and reports success #45): an indented file header no longer silently drops its section while reporting success. Stray lines between sections reject the patch, and the patched-path list matches the written files.
• fix: preserve line endings when updating a file #48 (fixes apply_patch rewrites CRLF and mixed line endings to LF on every update #47): CRLF and mixed line endings are preserved on update.
• feat: declare the Codex grammar through pi's constrainedSampling API #43 (thanks @zidou-kiyn): the Codex Lark grammar is declared through pi's constrainedSampling.

With #46 and #48, all 25 of Codex's portable apply_patch conformance scenarios pass.

Publishing is the GitHub release v0.1.4 (the publish workflow runs on release: published), dispatched by the maintainer after this merges. senpi then bumps external-versions.json to 0.1.4; its builtin port carries the same fixes in senpi #2637 and #2639.

[code-yeongyu]

Lead review (in-session): release 0.1.4 = version in package.json + package-lock.json and a dated CHANGELOG section for #43/#45/#47; no source or test change. All checks green on 347fb31 (4 test jobs, npm consumer, GitGuardian). Merging with the repo's admin bypass (author can't self-approve; same path as #43/#46/#48), then publishing GitHub release v0.1.4.