Add INSPECT verb example (character counting/replacement)

[devin-ai-integration]

Summary

Adds a new inspect/ directory with a COBOL example program demonstrating the INSPECT verb across 10 examples covering all three main forms:

• TALLYING (EX 1–4): Count all characters, count specific characters, count leading characters, and use BEFORE/AFTER INITIAL clauses
• REPLACING (EX 5–8): Replace all, leading, first occurrences, and scoped replacement with AFTER INITIAL
• CONVERTING (EX 9–10): Character translation tables (lowercase→uppercase), with and without AFTER INITIAL scoping

Includes a README.md with syntax examples and full program output, following the same structure as existing examples (e.g., trim/, unstring/).

The program was compiled and executed successfully with GnuCOBOL 3.1.2. Output in the README was captured from actual program execution.

Review & Testing Checklist for Human

• EX 1 tallies 30 (full PIC X(30) field length, including trailing spaces), not 11 (visible characters of "Hello World"). This is correct COBOL behavior but may confuse learners — consider whether a comment or README note should clarify this.
• Compile and run inspect/inspect.cbl with cobc -x inspect.cbl && ./inspect to verify the README output matches.
• Author in the file header is "Devin AI" — other repo examples use "Erik Eriksen". Adjust if preferred.

Notes

• Requested by: @shayanshafii
• Link to Devin run

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✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 4 additional findings.