Update Fuseki Edit view CodeMirror usage

[AtesComp]

• Create CodeMirror component for abstraction
• Replace Edit.vue textarea to CodeMirror element
• Update jena-fuseki-ui package.json to support native legacy mode languages

GitHub issue resolved #3555

Pull request Description: Fixes Fuseki UI graph edit contents for save.

---

• [ ] Tests are included.
• [ ] Documentation change and updates are provided for the Apache Jena website
• [ ] Commits have been squashed to remove intermediate development commit messages.
• [ ] Key commit messages start with the issue number (GH-xxxx)

By submitting this pull request, I acknowledge that I am making a contribution to the Apache Software Foundation under the terms and conditions of the Contributor's Agreement.

---

See the Apache Jena "Contributing" guide.

[afs]

Hi @AtesComp - good to see this PR!

I downloaded the PR and ran the Jena build (mvn clean install) which came across two issues:

1.The file jena-fuseki2/jena-fuseki-ui/src/components/dataset/CodeMirror.vue needs a license header comment (see other files in the same directory).

2. The yarn.lock file is not in-step with packages.json.

With workarounds for those two points, the build+tests works.

Also - please could you rebase the code to the latest state of main because today is our "javascript dependencies update day" from dependabot and today's batch changed yarn.lock.

[AtesComp]

On it. It'll be updated shortly. I've added a .gitignore entry for VSCode as well.

[afs]

One small request - could you squash the commits down to one commit please?