feat: add support for the project keyword in advanced search

Signed-off-by: Nicolas Crocfer <ncrocfer@gmail.com>

Author: ncrocfer

docs/guides/advanced_search.md

@@ -52,6 +52,7 @@ The currently supported fields are:
 - **vendor** - Search by vendor name (e.g., `microsoft`).
 - **product** - Search by product name (e.g., `android`).
 - **userTag** - Search by user tag associated with the CVE.
+- **project** – Search using the vendors and products subscribed in a project.
 
 !!! important
     Each field supports specific operators to refine your queries effectively:
@@ -112,6 +113,21 @@ To search all CVE in 1999's:
 cve:CVE-1999
 ```
 
+To search all CVEs related to the vendors and products subscribed to in a project:
+
+```
+project:my-project
+```
+
+!!! tip
+    Using the `project` field is convenient, as it automatically expands to include all the vendors and products your project is subscribed to.
+
+    For example, if **my-project** is subscribed to the **vendorX** and **vendorY** vendors, and the **productZ** product, the following two queries are equivalent:
+
+    - `project:my-project`
+    - `vendor:vendorX OR vendor:vendorY OR product:productZ`
+
+
 ## Query Builder
 
 If you're not comfortable writing advanced queries manually, OpenCVE provides a **Query Builder** to help you.