feat: Move getActiveEditorContent function to utils

[amitjoshi438]

The code changes add a new function called getActiveEditorContent to the Utils module. This function retrieves the content and parameters of the active editor in Visual Studio Code.
This pull request primarily involves changes to the src/common/Utils.ts and src/common/copilot/PowerPagesCopilot.ts files. The main changes include the addition of new imports in Utils.ts, the creation of a new function getActiveEditorContent() in Utils.ts, and the removal of the getActiveEditorContent() method from PowerPagesCopilot.ts to use the newly created function from Utils.ts.

Additions and modifications in src/common/Utils.ts:

• Added new imports from ./copilot/constants and ./copilot/model to include DataverseEntityNameMap, EntityFieldMap, FieldTypeMap, and IActiveFileData, IActiveFileParams respectively.
• Created a new function getActiveEditorContent(). This function retrieves the content of the active editor and returns an object of type IActiveFileData. The object includes the content of the active file and parameters related to the active file such as dataverseEntity, entityField, and fieldType.

Changes in src/common/copilot/PowerPagesCopilot.ts:

• Replaced the import of getLastThreePartsOfFileName with getActiveEditorContent from ../Utils.
• Replaced the call to this.getActiveEditorContent() with getActiveEditorContent() in the PowerPagesCopilot class. This change reflects the move of the getActiveEditorContent() function to Utils.ts.
• Removed the getActiveEditorContent() method from the PowerPagesCopilot class as it is now located in Utils.ts.