Update docs to: Implement Templates system (#117)

Author: github-actions[bot]

docs/img/placeholder-replacement.png

@@ -22,6 +22,9 @@ file and then continue editing.
 Opens another window of the editor. Due to the lack of support for multi-file editing (currently), 
 this is a good way to work with multiple files. 
 
+### New With Template
+It lists all templates, clicking on any template will create new file with that template.
+
 ### Open
 Creates a pop-up to select and open an existing file. 
 
@@ -269,6 +272,15 @@ apply last line indention level for new line.
 ### Remove All Indents
 Removes all indention and white spaces in both side of all lines.
 
+### Continue Placeholder Completion
+Returns you to Placeholder completion mode (when current file has any placeholder).
+
+### Save As Template
+Saves current file as a template with given name.
+
+### Templates
+Shows *Template Manager* window to view, edit, and remove templates.
+
 ## View 
 This menu includes options and actions related to editor layout and visible items.
 
@@ -390,16 +402,13 @@ Opens about dialog.
 There are some options that are always disabled in menus and are not yet available, these are listed
 below:
 
-- File > New With Template
 - Go To > Code Regions
 - Go To > Insert Navigation Mark
 - Go To > Navigation Marks
 - Go To > Table Of Contents
 - Go To > Bookmarks
 - Go To > Toggle Bookmark
 - Go To > Remove All Bookmarks
-- Format > Save As Template
-- Format > Templates
 - Tools > Security
 - Tools > Counter
 - Tools > Translation

docs/menus.md

@@ -0,0 +1,84 @@
+# Templates in Text Forge
+
+You can use templates to save time and reuse frequently used patterns. This page explains how to 
+create and use templates.
+
+## Create Your First Template
+
+Let's create your first template. In this example, we'll write a template for recording daily reports.
+To start, create a new file using the New option.
+
+!!! Tip
+
+    You can select **File > New** from the menu, use the shortcut `Ctrl + N`, or execute this command 
+    from the command palette.
+
+You can write your template like any other file. Use {{{}}} for placeholders to enable quick completion 
+features when using the template. There are also several predefined internal placeholders that you can use:
+
+- `{{{!file_name}}}` - The name of the file created from the template
+- `{{{!file_path}}}` - The path of the file created from the template
+- `{{{!time}}}` - The creation time of the instance in HH:MM:SS format
+- `{{{!date}}}` - The creation date of the instance in YYYY-MM-DD format
+- `{{{!datetime}}}` - The creation date and time of the instance in YYYY-MM-DD HH:MM:SS format
+
+For example, we create this template:
+
+```markdown
+# Daily Report - {{{!date}}}
+
+## Project: {{{project}}}
+## Author: {{{author}}}
+
+### Completed Tasks
+- {{{task_1}}}
+- {{{task_2}}}
+- {{{task_3}}}
+
+### Key Notes
+- {{{note_1}}}
+- {{{note_2}}}
+
+### Plan for Tomorrow
+- {{{next_step_1}}}
+- {{{next_step_2}}}
+
+---
+
+🕐 Logged at: {{{!time}}}
+```
+
+Our template is ready. To save it, select **Save As Template** from the **Format** menu, confirm the pop-up, 
+and enter a name for your template. Once you save it, you can use it as a template from now on.
+
+## Using a Template
+
+Templates help you create new files quickly, so we've placed them alongside other new file creation 
+options. You can see the available templates and select one from **File > New With Template**.
+
+After selecting a template, the new file is created with the template, and you enter Placeholder 
+replacement mode:
+
+![image.png](https://text-forge.github.io/docs/img/placeholder-replacement.png)
+
+On the left side of the replace panel, the Auto Insert option is displayed, indicating that `{{{!date}}}`
+is a predefined placeholder. If you hover your mouse over it, you can see more information. We can 
+use this option to replace the placeholder with the current date, or we can enter our desired value.
+In any case, after pressing the `Enter` key, the replacement is done, and the next placeholder is
+selected. After completing this placeholder, the `{{{project}}}` placeholder is selected, and since
+it is not a predefined placeholder, the Auto Insert option is not available.
+
+There are other options in this panel:
+
+- Next: Takes you to the next placeholder
+- Previous: Takes you to the previous placeholder
+- Close: Exits Placeholder replacement mode
+
+You can continue completing and then save the file, but you can postpone completion. To do this, use
+the `Escape` key or the Close option. You can return to completion mode at any time using the **Format > Continue Placeholder Completion** option.
+
+## Editing and Deleting Templates
+
+So far, we have examined the methods of creating and using templates. Another feature is the Template 
+Manager, which allows you to easily edit or delete templates. To open it, you can use the **Format > Templates...**
+option. In the window that opens, you can select templates, preview them, and edit or delete them.

docs/templates.md

@@ -25,6 +25,7 @@ nav:
       - Introduction: introduction.md
       - Setup: setup.md
   - Guides:
+      - Templates: templates.md
       - Menus: menus.md
       - Themes: themes.md
   - Architecture: