Kuanchou/1956 absolute size for catalog

[loveluthien]

Description

Close #1956. The symbol size of catalog sources now can follow the image coordinate (symbol size varying with zoom-in and zoom-out), and catalog sources can map by angular size. In addition, the showing catalog sources with their angular size is supported.

Checklist

For linked issues (if there are):

• [x] assignee and label added
• [ ] GitHub Project estimate added

For the pull request:

• [x] reviewers and assignee added
• [ ] GitHub Project estimate added
• [x] changelog updated / ~no changelog update needed~
• [x] ~unit test added (for functions with no dependenies)~
• [x] API documentation added (for public variables and methods in stores)

For dependencies:

• [ ] e2e test passing / corresponding fix added / new e2e test created
• [x] ~protobuf version bumped~ / no protobuf version bumped needed
• [x] ~protobuf updated to the latest dev commit~ / no protobuf update needed
• [x] ~corresponding ICD test fix added (BackendService changed)~ / no ICD test fix needed (BackendService unchanged)
• [ ] user manual prepared (for large new features)