[DOC-14261] Update Object and Number Functions

[rakhi-prathap]

Changes:

• Updated function titles to display only the function name.
• Removed the Description heading for all functions.
• Added a new Syntax section to each function, containing the full function definition (name + arguments).
• Moved the existing Arguments section to be a sub-section within Syntax.
• Replaced all examples to use ready-to-use code samples. (All samples locally tested and verified).

Previews:

• Number Functions
• Object Functions