:+1: Check `deno` executable and show executable path in `checkhealth`

[lambdalisue]

To avoid misconfiguration like #400

Summary by CodeRabbit

• New Features

  • Improved Deno version reporting by including the executable path for clarity.
  • Added a prerequisite check for the Deno executable before version validation, enhancing the health check process.

• Bug Fixes

  • Enhanced robustness of the health checking mechanism for Deno, reducing potential errors related to Deno installation issues.

[coderabbitai[bot]]

Walkthrough

The recent changes enhance the health check functionality for Deno within the Denops environment. The check_deno_version function now provides clearer output by including the Deno executable path. Additionally, a new prerequisite check verifies the presence of the Deno executable before proceeding to version verification, thereby improving robustness and user feedback during the health check process.

Changes

Files	Change Summary
autoload/health/denops.vim	Updated check_deno_version to include the executable path in the output; added a check for Deno executable before version check; both functions marked with abort.

Poem

🐰 In a world of code and hops,
A rabbit checks for Deno tops.
With paths revealed and checks anew,
Healthier code for me and you!
Hooray for upgrades, let them shine,
In the Denops garden, all is fine! 🌼

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.52%. Comparing base (fcc579b) to head (744b7a7).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #402 +/- ## ======================================= Coverage 95.52% 95.52% ======================================= Files 23 23 Lines 1384 1384 Branches 174 174 ======================================= Hits 1322 1322 Misses 59 59 Partials 3 3 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.