Refactor localization and remove CAIKnowledge entity

- Removed CAIKnowledge localization files for various languages (el_GR, en_GB, en_US, es_ES, es_MX, fa_IR, fr_FR, hr_HR, hu_HU, id_ID, it_IT, ja_JP, lt_LT, lv_LV, nb_NO, nl_NL, pl_PL, pt_BR, pt_PT, ro_RO, ru_RU, sk_SK, sl_SI, sr_RS, sv_SE, th_TH, tr_TR, uk_UA, ur_IN, vi_VN, zh_CN, zh_TW).
- Deleted related layout and metadata files for CAIKnowledge.
- Removed references to CAIKnowledge in existing metadata definitions for CDokumente, CMietinkasso, and CVmhRumungsklage.
- Updated config and state files to reflect the removal of CAIKnowledge.
- Cleaned up unused localization keys in existing JSON files.

custom/Espo/Custom/Resources/i18n/en_US/CMietinkasso.json

@@ -13,8 +13,7 @@
         "freigeschalteteNutzer": "Activated Users (deprecated)",
         "collaborators": "Collaborators",
         "vmhVermietersMIK": "Landlord",
-        "advowareAkten": "Advoware Akten",
-        "aIKnowledge": "AI Knowledge"
+        "advowareAkten": "Advoware Akten"
     },
     "links": {
         "meetings": "Meetings",
@@ -29,8 +28,7 @@
         "collaborators": "Collaborators",
         "vmhVermietersMIK": "Landlord",
         "pulse": "Pulses",
-        "advowareAkten": "Advoware Akten",
-        "aIKnowledge": "AI Knowledge"
+        "advowareAkten": "Advoware Akten"
     },
     "labels": {
         "Create CMietinkasso": "Create Mietinkasso"