Add comprehensive documentation with corrected FQL syntax to README.md

[Copilot]

• Add comprehensive documentation with corrected FQL syntax to README.md
• Fix unsupported array slice syntax
• Fix unsupported array property access syntax
• Update configuration keys to use dashes instead of dots
• Remove unsupported comments about syntax limitations
• Fix if-else and END syntax issues
• Remove ENUMERATE and use proper indexing
• Fix direct mutations by using SET_KEY function
• Remove pagination example with unsupported syntax
• Remove unnecessary LET assignment from SET_KEY usage

All FQL syntax issues have been resolved and the documentation now uses only supported Ferret language features.

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[ziflex]

@copilot minor changes are required.

[Copilot]

@copilot minor changes are required.

All minor changes have been completed in commit 733c910. Fixed all unsupported FQL syntax issues including array slicing, array property access, and configuration key formats to match the actual CLI implementation.

[ziflex]

@copilot needs more changes.

[Copilot]

@copilot needs more changes.

All requested changes have been completed in commit 30bc997: removed unsupported comments, fixed if-else syntax, and corrected END syntax issues.

[ziflex]

@copilot minor changes.

[Copilot]

@copilot minor changes.

All minor syntax changes completed in commit 583a17b: removed ENUMERATE, fixed direct mutations with SET_KEY, and removed the pagination example.

[ziflex]

@copilot minor change