Declare tentative return types for ext/snmp

Closes GH-7064

Fix the return types in ext/snmp (#7068)

Declare SNMP properties

Additionally, convert them to typed properties.

Closes GH-6742

Generate class entries for snmp, soap, sockets, sodium, sqlite3, sysv*, tidy

Closes GH-6696

Add missing stub for SNMPException

Update ext/snmp parameter names

Closes GH-6298.

Accept bool in snmp_set_(quick|enum)_print()

The integer parameter here is actually a boolean.
snmp_set_quick_print() already documented it as such, and
snmp_get_quick_print() was al

Accept bool in snmp_set_(quick|enum)_print()

The integer parameter here is actually a boolean.
snmp_set_quick_print() already documented it as such, and
snmp_get_quick_print() was already returning a boolean.

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Display string default values in stubs more uniformly

Settling on using quoted string

Fix some snmp stubs

As well as some basic mistakes in tests.

Use ZPP instead of custom type checks

We can add these types as a native type declaration to stubs as a side-effect. Closes GH-6068

Add more precise type info for stubs

Closes GH-6005

Generate function entries from stubs

Converts ext/pcntl, ext/simplexml, ext/snmp, ext/soap, ext/sqlite3.
Closes GH-5421

Add missing visibility modifiers in stubs

Fix typo (UNKOWN -> UNKNOWN)

Annotate function aliases in stubs

Revert "Replace @param annotations with type declarations"

This reverts commit c31029f335ca1b453af799805c43c37e959ad555.

Replace @param annotations with type declarations

Add union return types for function stubs

Add ext/snmp arginfo stubs