[ON week] Add language client examples to get-started/index-basics.md

[leemthompo]

Uses https://github.com/elastic/request-converter

I've got a hacky Python script that automates adding multi-language code examples to docs pages.

• Finds console code blocks in markdown files
• Converts them to multiple languages (Python, JS, PHP, Ruby, curl) using es-request-converter CLI
• Pulls everything into snippets files
• Wraps results in tab-sets (handles incrementing outermost colons in directives to work with steppers etc.)
• Handles annotations, localhost replacement, and formatting quirks
• Works around two bugs found in the converter itself (fixed in meantime!)

I'll share and "document" the script itself as part of ON week summary.

[github-actions]

🔍 Preview links for changed docs

• solutions/search/get-started/index-basics.md

[leemthompo]

It's necessary to pull all the examples into separate snippets and include them, otherwise it balloons the source page enormously. However, I'm on the fence about whether the console blocks should also be snippetized.
I think the authoring experience becomes more opaque when those console blocks aren't on the page itself, and it makes it even harder for infrequent contributors to make even trivial typo fixes in code blocks. Food for thought.

The latest iteration of my script has a -- regenerate option which wipes all the language examples and reconverts remaining console blocks.

[leemthompo]

Putting this up for review for anybody interested in the approach, all feedback is welcome :)