fix(db-browser): optimize the visualization of mysql table ddl and supports empty string ''

[ISADBA]

What type of PR is this?

type-feature dbbrowser

What this PR does / why we need it:

Optimize the visualization of MySQL table structure design to arrange the generation of field
information, supporting strings enclosed in single quotes ('').

Which issue(s) this PR fixes:

Fixes #1317

Special notes for your reviewer:

This PR also has a corresponding frontend PR.
oceanbase/odc-client#37

Additional documentation e.g., usage docs, etc.:

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