fix(readme.md): reorder installation steps in README.md

[Jah-yee]

Description

The markdown-it build requires dependencies in web_core like @a2ui/web_core: file:../../web_core. Without building web_core first, npm run build on the markdown-it project fails with missing dependency errors.

This PR reorders the installation steps so that web_core is built before markdown-it.

Before

# Install and build the Markdown renderer
cd renderers/markdown/markdown-it
npm install
npm run build

# Install and build the Web Core library
cd ../../web_core
npm install
npm run build

After

# Install and build the Web Core library (must be built first - markdown-it depends on it)
cd renderers/web_core
npm install
npm run build

# Install and build the Markdown renderer
cd ../markdown/markdown-it
npm install
npm run build

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[gemini-code-assist]

Code Review

This pull request correctly reorders the installation steps in the README.md file to address a dependency issue where web_core must be built before markdown-it. The change is logical and well-explained. I have added one suggestion to improve the robustness of the shell commands provided in the documentation.

[gemini-code-assist]

For better robustness and user experience, consider running the build commands for each package within a subshell (...). This prevents the cd command from changing the user's current directory and makes each step runnable independently from the project root. Chaining commands with && also ensures that subsequent commands only run if the previous ones succeed.

For example:

# Install and build the Web Core library (must be built first - markdown-it depends on it)
(cd renderers/web_core && npm install && npm run build)

# Install and build the Markdown renderer
(cd renderers/markdown/markdown-it && npm install && npm run build)