validate snippets inside `README.md`

[yegor256]

Currently, we have EO snippets inside README.md, which are not checked for validity anyhow. Let's create a new GHA job, which will extract all snippets from the Markdown file, compile them and run.

[github-actions[bot]]

@yegor256 thanks for the report, here is a feedback:

Problems

• The bug report's title lacks precision and descriptiveness. It needs to explicitly indicate the issue rather than the required action.
• Essential details are missing in the bug report, including steps to reproduce the issue, the expected outcome, and the actual outcome.

• The bug report fails to offer any error messages or logs, which could aid in better understanding the problem.

  Suggestions

• Title: Make the title more descriptive and precise. Instead of "validate snippets inside README.md", you might use "Issue with Unchecked EO Snippets in README.md".
• Detailed Description: Start with a brief introduction of the problem, then provide more context. For instance, when and where does this issue typically occur? What is the impact of this issue?
• Steps to Reproduce: Elaborate on the steps that led to the identification of this bug. For instance, which part of the code or process leads to the discovery of the unvalidated EO snippets?
• Expected vs. Actual Results: Clearly state what the expected outcome should be and how the actual outcome differs. For example, were the EO snippets expected to be validated, but weren't?
• Error Messages/Logs: Include any relevant error messages, logs, or screenshots that may help in understanding the problem better.
• Context: Share any additional context or observations that could be helpful. For instance, does this problem occur consistently or intermittently?
• Formatting: Ensure your report is well-formatted and easy to read. Lists, bullet points, and headers can greatly improve readability.
• Language: Keep your language clear, concise, and professional. Avoid jargon and explain any abbreviations used.

Please fix the bug report in order it to get resolved faster. Analyzed with gpt-4

[maxonfjvipon]

There are many objects from other eo- repositories (eo-collections, eo-txt, ...) in examples in README. So they won't compile until #1602 is resolved

[deemp]

I explained how I run code snippets in the normalizer repo using mdsh (link).