Change HTTPS to HTTP for Ada-Europe.org

Work around for the problem reported by the link checker (see issue #115)

New home for AdaChess in GitHub

Close #117

Merge pull request #114 from Irvise/master

Add HiRTOS and SweetAda

Merge pull request #113 from atalii/leechlike-self-promotion

add Adage

Work around the last problems reported by the linter

This works around these problems:

README.md:191:3:   https://matrix.to/#/#ada-lang_Lobby:gitter.im  remark-lint:double-link
README.md:199:112: https://matrix.to/#/#ada-lang:matrix.org       remark-lint:double-link

Which are due to an issue in the linter: https://github.com/Scrum/remark-lint-double-link/pull/10

Closes #107

Merge pull request #108 from ohenley/add-license-1

Add CC0 license file using template

Merge pull request #111 from ohenley/awesome-lint-links

Fix issues reported by awesome-lint (double-link, awesome-list-item)

Fix issues reported by awesome-lint (double-link, awesome-list-item)

Fixes these occurrences:
```
  ✖  266:122  https://github.com/AdaCore/ada_language_server               remark-lint:double-link
  ✖  289:3    Invalid list item link                                       remark-lint:awesome-list-item
  ✖  302:69   List item description must start with valid casing           remark-lint:awesome-list-item
  ✖  322:3    Invalid list item link                                       remark-lint:awesome-list-item
  ✖  343:3    Invalid list item link                                       remark-lint:awesome-list-item
  ✖  346:3    Invalid list item link                                       remark-lint:awesome-list-item
  ✖  350:3    Invalid list item link                                       remark-lint:awesome-list-item
  ✖  384:3    Invalid list item link                                       remark-lint:awesome-list-item
  ✖  402:3    Invalid list item link                                       remark-lint:awesome-list-item
  ✖  449:3    https://github.com/AdaCore/ada_language_server               remark-lint:double-link
  ✖  492:3    Invalid list item link                                       remark-lint:awesome-list-item
  ✖  523:3    Invalid list item link                                       remark-lint:awesome-list-item
  ✖  537:3    Invalid list item link                                       remark-lint:awesome-list-item
  ✖  562:3    Invalid list item link                                       remark-lint:awesome-list-item
  ✖  573:3    Invalid list item link                                       remark-lint:awesome-list-item
  ✖  574:3    Invalid list item link                                       remark-lint:awesome-list-item
  ✖  590:3    Invalid list item link                                       remark-lint:awesome-list-item
  ✖  695:3    Invalid list item link                                       remark-lint:awesome-list-item
  ✖  724:3    Invalid list item link                                       remark-lint:awesome-list-item
  ✖  725:3    Invalid list item link                                       remark-lint:awesome-list-item
  ✖  735:3    Invalid list item link                                       remark-lint:awesome-list-item
  ✖  736:3    Invalid list item link                                       remark-lint:awesome-list-item
```

See issue #107

Add CC0 license file using template

As recommended by:
https://github.com/sindresorhus/awesome/blob/main/pull_request_template.md#requirements-for-your-awesome-list

This will allow removing these awesome-lint errors:
```
README.md:1:1:   License was not detected by GitHub                           remark-lint:awesome-github
README.md:1:1:   Forbidden license section found                              remark-lint:awesome-license
```

Merge pull request #112 from mgrojo/lychee-link-checker

New better link checker and dead links fixed

Merge pull request #109 from ohenley/add-main-heading

Add main heading and new badge

Merge pull request #110 from ohenley/fix-synth-lib-double-link

Remove double-link reported by awesome-lint

Remove double-link reported by awesome-lint

Left only in the Embedded section, since it of most interest in that area than as a general sound library.

```
README.md:592:3:   https://github.com/raph-amiard/ada-synth-lib                 remark-lint:double-link
README.md:653:3:   https://github.com/raph-amiard/ada-synth-lib                 remark-lint:double-link
```
See issue #107

Fix TOC problems reported by awesome-lint

See issue #107

Fix some issues reported by lint-awesome

These issues go in the categories:
- Important ones to be solved.
- Puristic ones easy to solve.
See issue #107

Merge pull request #104 from mgrojo/master

Action for link checker and lint, plus fixed broken links

 Add link checker and linter

https://github.com/sindresorhus/awesome/issues/1810#issuecomment-1321607755

Merge pull request #102 from pyjarrett/master

Replace programming-with-ada with ada-lang-io

Merge pull request #100 from adelnoureddine/patch-1

Update PowerJoular link and typo