Add Chapter - String in Python

[codewithdhruba01]

We need to add a new chapter to the Python tutorial titled "String in Python". This chapter should cover the basic and advanced concepts of string handling in Python with examples and explanations.

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Expected Topics to Cover:

• What is a String in Python
• Creating Strings
• String Indexing and Slicing
• String Methods (upper(), lower(), strip(), replace(), etc.)
• String Concatenation and Repetition
• Using in and not in operators
• String Formatting (f-string, format(), % operator)
• Escape Sequences (\n, \t, etc.)
• Multiline Strings
• Use Cases and Examples

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Suggested Format:

• Use Docusaurus markdown syntax
• Include code blocks and output examples
• Organize content using headings and subheadings
• End with a small quiz or practice task

[github-actions]

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