docs: grammar: admin perf optimization

docs: phrasing: admin monitor

Docs: grammar: manage connections

docs: grammar: admin import

docs: grammar: user management

Grammar and minor edits for Admin > Performance Optimization page

Phrasing for the Admin > TDengine Monitoring page

Minor grammar edits to the Admin > Manage connections page

Minor grammar updates to the Admin > Data Import page.

Minor grammar changes for the User Management page

for 2.4

[TD-15999]

docs: grammar: resource planning

docs: grammar: admin install

docs: grammar: sql json

docs: grammar: sql limits

docs: grammar: sql interval

docs: grammar: sql functions

docs: grammar: sql select

docs: grammar: sql insert

docs: grammar: sql stable

docs: grammar: sql table

docs: grammar: sql database

docs: grammar: data type

Minor grammar edits to the Resource Planning page

Minor grammar updates and formatting for Admin > Install & Uninstall page

Minor grammar updates to SQL > JSON page

Minor grammar edits to SQL > Limits page

Grammar updates to the SQL > Interval page.

Minor grammar and formatting updates to SQL > Functions page

Minor grammar updates to the SQL > Select page

Minor grammar changes to the SQL Insert page

Minor grammar updates to SQL > STable page.

Minor grammar changes to the SQL > Table page.

Minor grammar changes to the SQL > Database page

Minor grammar changes to the SQL data types page.

docs: use webp format images