Added an FAQ (#5092)

### What problem does this PR solve?


### Type of change


- [x] Documentation Update

docs/references/faq.md

@@ -22,6 +22,35 @@ The "garbage in garbage out" status quo remains unchanged despite the fact that
 
 ---
 
+### Where to find the version of RAGFlow? How to interprete it?
+
+You can find the RAGFlow version number on the **System** page of the UI:
+
+![Image](https://github.com/user-attachments/assets/20cf7213-2537-4e18-a88c-4dadf6228c6b)
+
+If you build RAGFlow from source, the version number is also in the system log:
+
+```
+        ____   ___    ______ ______ __               
+       / __ \ /   |  / ____// ____// /____  _      __
+      / /_/ // /| | / / __ / /_   / // __ \| | /| / /
+     / _, _// ___ |/ /_/ // __/  / // /_/ /| |/ |/ / 
+    /_/ |_|/_/  |_|\____//_/    /_/ \____/ |__/|__/                             
+
+2025-02-18 10:10:43,835 INFO     1445658 RAGFlow version: v0.16.0-50-g6daae7f2 full
+```
+
+Where:
+
+- `v0.16.0`: The officially published release.
+- `50`: The number of git commits since the official release.
+- `g6daae7f2`: `g` is the prefix, and `6daae7f2` is the first seven characters of the current commit ID.
+- `full`/`slim`: The RAGFlow edition.
+  - `full`: The full RAGFlow edition.
+  - `slim`: The RAGFlow edition without embedding models and Python packages.
+
+---
+
 ### Why does it take longer for RAGFlow to parse a document than LangChain?
 
 We put painstaking effort into document pre-processing tasks like layout analysis, table structure recognition, and OCR (Optical Character Recognition) using our vision models. This contributes to the additional time required.

docs/references/http_api_reference.md

@@ -2178,10 +2178,12 @@ Creates a session with an agent.
 - Body:
   - the required parameters:`str`
   - other parameters:
-    The parameters in the begin component.
+    The parameters set in the **Begin** component.
 
 ##### Request example
-If `begin` component in the agent doesn't have required parameters:
+
+If the **Begin** component in your agent does not have required parameters:
+
 ```bash
 curl --request POST \
      --url http://{address}/api/v1/agents/{agent_id}/sessions \
@@ -2190,7 +2192,9 @@ curl --request POST \
      --data '{
      }'
 ```
-If `begin` component in the agent has required parameters:
+
+If the **Begin** component in your agent has required parameters:
+
 ```bash
 curl --request POST \
      --url http://{address}/api/v1/agents/{agent_id}/sessions \
@@ -2201,7 +2205,9 @@ curl --request POST \
             "file":"Who are you"
      }'
 ```
-If `begin` component in the agent has required file parameters:
+
+If the **Begin** component in your agent has required file parameters:
+
 ```bash
 curl --request POST \
      --url http://{address}/api/v1/agents/{agent_id}/sessions?user_id={user_id} \
@@ -2215,7 +2221,7 @@ curl --request POST \
 - `agent_id`: (*Path parameter*)  
   The ID of the associated agent.
 - `user_id`: (*Filter parameter*), string
-  The optional user-defined ID for parsing docs(especially images) when creating session while uploading files.
+  The optional user-defined ID for parsing docs (especially images) when creating a session while uploading files.
 
 #### Response
 
@@ -2367,7 +2373,7 @@ Asks a specified agent a question to start an AI-powered conversation.
   - `"user_id"`: `string`(optional)
   - other parameters: `string`
 ##### Request example
-If the `begin` component doesn't have parameters, the following code will create a session.
+Ifthe **Begin** component doesn't have parameters, the following code will create a session.
 ```bash 
 curl --request POST \
      --url http://{address}/api/v1/agents/{agent_id}/completions \
@@ -2377,7 +2383,7 @@ curl --request POST \
      {
      }'
 ```
-If the `begin` component have parameters, the following code will create a session.
+Ifthe **Begin** component have parameters, the following code will create a session.
 ```bash
 curl --request POST \
      --url http://{address}/api/v1/agents/{agent_id}/completions \
@@ -2403,7 +2409,6 @@ curl --request POST \
      }'
 ```
 
-
 ##### Request Parameters
 
 - `agent_id`: (*Path parameter*), `string`  
@@ -2419,9 +2424,10 @@ curl --request POST \
 - `"user_id"`: (*Body parameter*), `string`  
   The optional user-defined ID. Valid *only* when no `session_id` is provided.
 - Other parameters: (*Body Parameter*)  
-  The parameters in the begin component.
+  Parameters specified in the **Begin** component.
+
 #### Response
-success without `session_id` provided and with no parameters in the `begin` component:
+success without `session_id` provided and with no parameters inthe **Begin** component:
 ```json
 data:{
     "code": 0,
@@ -2439,7 +2445,7 @@ data:{
     "data": true
 }
 ```
-Success without `session_id` provided and with parameters in the `begin` component:
+Success without `session_id` provided and with parameters inthe **Begin** component:
 
 ```json
 data:{
@@ -2475,7 +2481,7 @@ data:{
 }
 data:
 ```
-Success with parameters in the `begin` component:
+Success with parameters inthe **Begin** component:
 ```json
 data:{
     "code": 0,

docs/references/python_api_reference.md

@@ -1461,7 +1461,7 @@ In streaming mode, not all responses include a reference, as this depends on the
 
 ##### question: `str`
 
-The question to start an AI-powered conversation. If the `begin` component takes parameters, a question is not required.
+The question to start an AI-powered conversation. Ifthe **Begin** component takes parameters, a question is not required.
 
 ##### stream: `bool`