feat: property snippets jigx

[p-spacek]

What does this PR do?

the main purpose of this PR is to add support for property snippets
but it also fixes a few other issues

What issues does this PR fix or reference?

https://app.clickup.com/t/868c50fu6
the base of this branch is feat/property-snippets it's base is main

• it means that all changes should be made in feat/property-snippets to include it into the official redhat repo
  feat: property snippets #36

some schema examples:

    "snippets": {
      "type": "object",
      "properties": {
        "hyphen": {
          "type": "object",
          "properties": {
            "array1": {
              "type": "array",
              "items": {
                "type": "object",
                "defaultSnippets": [
                  {
                    "label": "My array item",
                    "body": { "item1": "$1" }
                  }
                ],
                "required": ["thing1"],
                "properties": {
                  "thing1": {
                    "type": "object",
                    "required": ["item1"],
                    "properties": {
                      "item1": { "type": "string" }
                    }
                  }
                }
              }
            }
          }
        },
        "aaa": {
          "type": "array",
          "items": {
            "anyOf": [
              {
                "type": "object",
                "properties": {
                  "fooBar": {
                    "type": "object",
                    "properties": {
                      "name": {
                        "type": "string"
                      },
                      "aaa": {
                        "type": "array"
                      }
                    },
                    "required": ["name", "aaa"]
                  }
                }
              }
            ]
          }
        },
        "examples": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "objectWithArray": {
                "type": "array",
                "items": {
                  "type": "object",
                  "required": ["item", "item2"],
                  "properties": {
                    "item": { "type": "string" },
                    "item2": { "type": "string" }
                  }
                }
              }
            }
          }
        },
        "snippetString": {
          "type": "string",
          "$comment": "OK, property, value",
          "defaultSnippets": [
            {
              "label": "labelSnippetString",
              "body": "test"
            }
          ]
        },
        "snippetObject": {
          "type": "object",
          "$comment": "OK, property, value, value nested",
          "properties": {
            "item1": { "type": "string" },
            "item2": {
              "type": "object",
              "defaultSnippets": [
                {
                  "label": "labelSnippetObject",
                  "body": {
                    "item2.1": "test",
                    "item2.2": "string"
                  }
                }
              ]
            }
          },
          "required": ["item1", "item2"]
        },
        "snippetArray": {
          "type": "array",
          "$comment": "property - Not implemented, OK: value, value nested, value nested with -, OK on 2nd index without or with -",
          "items": {
            "type": "object",
            "properties": {
              "item1": { "type": "string" },
              "item2": { "type": "object" }
            },
            "required": ["item1", "item2"]
          },
          "defaultSnippets": [
            {
              "label": "labelSnippetArray",
              "body": {
                "value": "test",
                "valueType": "string"
              }
            }
          ]
        },
        "snippetArray2": {
          "type": "array",
          "$comment": "property - Not implemented, OK: value, value nested, NOT OK value nested with -",
          "items": {
            "type": "string"
          },
          "defaultSnippets": [
            {
              "label": "labelSnippetArray2",
              "body": ["string", false, 5, null]
            }
          ]
        },
        "snippetArrayInsideItems": {
          "type": "array",
          "$comment": "property - Ok, NOT OK: value, OK value nested, OK value nested with -, OK on 2nd index without or with -",
          "items": {
            "type": "object",
            "properties": {
              "item1": { "type": "string" },
              "item2": { "type": "object" }
            },
            "required": ["item1", "item2"],
            "defaultSnippets": [
              {
                "label": "snippetArrayInsideItems",
                "body": {
                  "value": "test",
                  "valueType": "string"
                }
              }
            ]
          }
        },
        "snippetArrayInsideItems2": {
          "type": "array",
          "$comment": "not ok",
          "items": {
            "ztype": ["string", "boolean", "number", "null"],
            "zzadditionalProperties": true,
            "defaultSnippets": [
              {
                "label": "snippetArrayInsideItems2",
                "body": ["string", false, 5, null]
              }
            ]
          }
        }
      }
    },

Is it tested? How?

tests