docs: extension readme

[Daanvdplas]

No description provided.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.41%. Comparing base (3cdb9b5) to head (102e48f).
Report is 2 commits behind head on main.

@@             Coverage Diff             @@
##             main     #394       +/-   ##
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+ Coverage   54.34%   68.41%   +14.06%     
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  Files          49       70       +21     
  Lines        5025    11838     +6813     
  Branches     5025    11838     +6813     
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+ Hits         2731     8099     +5368     
- Misses       2245     3482     +1237     
- Partials       49      257      +208     

see 21 files with indirect coverage changes

[chungquantin]

Nice to have basic examples (similar to the one in mock test). In overall, I'm happy with the doc, very well-written!

[Daanvdplas]

You mean adding examples to the readme?

[chungquantin]

You mean adding examples to the readme?

Looking at the existing code in the testnet runtime, there are a lot of noises aside from the direct configuration of the module.

Something like the code snippet below could be useful for someone that interested to use this in their code.

struct ExampleFunction;

...

pub(crate) type Functions = (
	ExampleFunction<WithFuncId<ExampleFuncId>, Runtime>,
);

#[derive(Default)]
pub struct Config;
impl super::Config for Config {
	type Functions = Functions;

	const LOG_TARGET: &'static str = "pop-chain-extension";
}