setting max page limit for pagination via environment variable

[yesoreyeram]

Fixes #1050

Note: Documentation not added in this PR. ( currently pagination is a undocumented / beta feature )

How to test

Before changes

• git checkout main && yarn && yarn build && mage -v && docker compose up
• Visit the explore page and you will see the pokemon api calls with pagination and summarize option set.
• You should see the results as 10 ( 5 page max and 2 items in each page ). Even though max page is set to 20 in query, it will restrict to 5 as default behaviour.

After changes

• git checkout pagination/max-pages-configuration && yarn && yarn build && mage -v && docker compose up
• Visit the explore page and you will see the pokemon api calls with pagination and summarize option set.
• You should see the results as 16 ( 8 page max set via environment variable and 2 items in each page ). Even though max page is set to 20 in query, it will restrict to 8 as the environment variable is set and honoured with new behaviour.