Add a capability for the reference API and expose the regex to clients

[nickvergessen]

Fix #34278

{
  "ocs": {
    "meta": {
      "status": "ok",
      "statuscode": 200,
      "message": "OK"
    },
    "data": {
      "version": {
        "major": 26,
        "minor": 0,
        "micro": 0,
        "string": "26.0.0 dev",
        "edition": "",
        "extendedSupport": false
      },
      "capabilities": {
        "core": {
          "pollinterval": 60,
          "webdav-root": "remote.php/webdav",
          "reference-api": true,
          "reference-regex": "(\\s|\\n|^)(https?:\\/\\/)((?:[-A-Z0-9+_]+\\.)+[-A-Z]+(?:\\/[-A-Z0-9+&@#%?=~_|!:,.;()]*)*)(\\s|\\n|$)"
        },
…

[nickvergessen]

/backport to stable25

[mahibi]

for kotlin /mi is not supported.

So i have to use
"(\s|\n|^)(https?:\/\/)((?:[-A-Z0-9+_]+\.)+[-A-Z]+(?:\/[-A-Z0-9+&@#%?=~_|!:,.;()]*)*)(\s|\n|$)"
instead of
"/(\s|\n|^)(https?:\/\/)((?:[-A-Z0-9+_]+\.)+[-A-Z]+(?:\/[-A-Z0-9+&@#%?=~_|!:,.;()]*)*)(\s|\n|$)/mi"

and do
regexString.toRegex(setOf(RegexOption.MULTILINE, RegexOption.IGNORE_CASE))

Could we maybe return the regex from capabilities without /mi ?
@nickvergessen @SystemKeeper

[SystemKeeper]

So i have to use
"(\s|\n|^)(https?:\/\/)((?:[-A-Z0-9+_]+\.)+[-A-Z]+(?:\/[-A-Z0-9+&@#%?=~_|!:,.;()]*)*)(\s|\n|$)"

Same for me. I quickly tested using the regex yesterday, but haven't put too much time into it (current implementation just uses the apple link detection lib)

[nickvergessen]

Adjusted