Fix typos in docs/comments, add missing opcode documentation, and handle `%c` console specifier

[rajat552]

Description

I found several small issues across the codebase while reading through the source:

1. Duplicate word "the the" in doc comments (3 locations).
2. Missing documentation for some opcodes.
3. %c console specifier is not properly handled.

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Proposed Changes

• Remove duplicate words in documentation comments.
• Add missing opcode documentation with proper descriptions.
• Implement or fix handling of the %c console specifier.
• Review related files to ensure consistency and avoid similar issues.

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Why This Matters

• Improves code readability and professionalism.
• Helps new contributors understand the codebase better.
• Ensures console formatting works correctly.

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