Allow passing custom JVM arguments via jvm_args parameter

[HenryNebula]

Description

Legacy issue: baztian/jaydebeapi#161

Tier: P0 — shared-bug

Our connect() function still lacks a jvm_args parameter. The JVM arguments are hardcoded in _jdbc_connect_jpype() with no way for users to pass custom JVM args like -Duser.timezone. This is the same limitation as the upstream library.

Expected Behavior

Users should be able to pass custom JVM arguments when calling connect():

conn = jaydebeapi.connect(
    'org.h2.Driver',
    'jdbc:h2:mem:test',
    ['sa', ''],
    'h2.jar',
    jvm_args=['-Duser.timezone=America/Toronto']
)

Current Behavior

No way to pass custom JVM arguments. Users who need settings like -Dfile.encoding=UTF-8 or -Duser.timezone have no supported way to do so.

[HenryNebula]

Triage fix: #91