fix(@a2ui/markdown-it): widen web_core peer dep to >=0.9.2

[eugenelim]

Fixes #1930.

@a2ui/markdown-it@0.0.4 was published when web_core was at 0.9.2, so prepare-publish.mjs baked in ^0.9.2 as the peer dep. Since then web_core shipped 0.10.x, and any project that pulls in @a2ui/react@^0.10 alongside @a2ui/web_core@^0.10 gets an ERESOLVE override warning on every install:

npm warn ERESOLVE overriding peer dependency
npm warn peer @a2ui/web_core@"^0.9.2" from @a2ui/markdown-it@0.0.4

The fix: change peerDependencies["@a2ui/web_core"] from workspace:* (which prepare-publish.mjs resolves to ^<current-version> at publish time) to an explicit >=0.9.2. This bypasses the workspace replacement and produces a wide range in the published package — no more peer conflict when web_core bumps again. Bumps to 0.0.5.

The devDependencies entry is left as workspace:* so local builds continue to use the monorepo copy.

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[gemini-code-assist]

Code Review

This pull request updates the package.json for @a2ui/markdown-it, bumping the version to 0.0.5 and changing the peer dependency of @a2ui/web_core from workspace:* to >=0.9.2. There are no review comments, and I have no feedback to provide.