Add mjb_status_message function

[zaerl]

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[Copilot]

Pull request overview

Adds a new public utility API (mjb_status_message) that maps mjb_status codes to static English messages, and wires it through the generator/docs, WASM/TypeScript bindings, tests, fuzzing, and the CLI’s JSON error output so shell commands can report errors more consistently.

Changes:

• Introduce mjb_status_message(mjb_status) in the core C library, export it to WASM, and document it in API.md.
• Update the CLI to emit structured JSON errors (and refactor shell printing helpers) while switching many command error paths to use mjb_status_message.
• Add new tests/examples and extend fuzz coverage for the new API.

Reviewed changes

Copilot reviewed 23 out of 24 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
utils/generate/types.ts	Adds a statuses enum-value list for generator/UI purposes.
utils/generate/html-function.ts	Uses statuses to render mjb_status args as a select input in generated HTML.
utils/generate/functions.ts	Registers the new mjb_status_message public API for header/doc/WASM generation.
tests/shell/break-json.cmake	Updates expected JSON error output behavior for break with no input.
tests/mojibake.c	Adds unit assertions for mjb_status_message known/unknown cases.
tests/example.c	Adds generated example/coverage snippet for mjb_status_message.
src/shell/shell.h	Declares new mjbsh_error() helper for consistent CLI error reporting.
src/shell/shell.c	Implements mjbsh_error() and refactors varargs printing to safely reuse va_list.
src/shell/commands/string.c	Switches case-mapping command to use mjbsh_error() + mjb_status_message().
src/shell/commands/normalize.c	Switches normalization commands to use mjbsh_error() + status messages.
src/shell/commands/locale.c	Switches locale parsing command to use mjbsh_error() + status messages.
src/shell/commands/filter.c	Switches filter command failures to use mjbsh_error() + status messages.
src/shell/commands/emoji.c	Switches codepoint-input failure to use mjbsh_error().
src/shell/commands/codepoint.c	Adds CLI error messages for invalid/failed codepoint parsing/encoding.
src/shell/commands/character.c	Switches character iteration failure to use mjbsh_error() + status messages.
src/shell/commands/break.c	Switches JSON “missing input” and “unknown mode” errors to mjbsh_error().
src/shell/commands/bidi.c	Switches bidi resolve failure to use mjbsh_error() + status messages.
src/mojibake.h	Exposes the new public declaration mjb_status_message.
src/mojibake.c	Implements the status-to-message mapping table.
src/CMakeLists.txt	Exports _mjb_status_message for the Emscripten/WASM build.
src/api/mojibake.d.ts	Adds TypeScript WASM module typing for _mjb_status_message.
src/api/index.ts	Adds Mojibake.statusMessage() wrapper around the WASM export.
fuzz/fuzz.c	Adds a fuzz case to exercise mjb_status_message across many inputs.
API.md	Adds generated API documentation for mjb_status_message.

Comments suppressed due to low confidence (1)

src/shell/commands/normalize.c:81

• Avoid using the status message as a printf-style format string here as well; pass it via "%s" to prevent format-string interpretation.

    if(status != MJB_STATUS_OK) {
        free(codepoints);

        return mjbsh_error(mjb_status_message(status));
    }

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