eol: add page (#10380)

* eol: add page

---------

Co-authored-by: pixel <pixel+github@chrissx.de>
Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>
Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

pages/common/eol.md

@@ -0,0 +1,28 @@
+# eol
+
+> Show end-of-life dates (EoLs) for a number of products.
+> More information: <https://github.com/hugovk/norwegianblue>.
+
+- List all available products:
+
+`eol`
+
+- Get EoLs of one or more products:
+
+`eol {{product1 product2 ...}}`
+
+- Open the product webpage:
+
+`eol {{product}} --web`
+
+- Get EoLs of a one or more products in a specific format:
+
+`eol {{product1 product2 ...}} --format {{html|json|md|markdown|pretty|rst|csv|tsv|yaml}}`
+
+- Get EoLs of one or more products as a single markdown file:
+
+`eol {{product1 product2 ...}} --format {{markdown}} > {{eol_report.md}}`
+
+- Display help:
+
+`eol --help`