Support streaming & local mode, install piper from pypi

[thespad]

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• I have read the contributing guideline and understand that I have made the correct modifications

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Description:

Upstream docs are still garbage, 2.x release supposedly fixes CUDA but can't confirm properly

Benefits of this PR and context:

How Has This Been Tested?

Source / References:

[LinuxServer-CI]

I am a bot, here is the pushed image/manifest for this PR:

ghcr.io/linuxserver/lspipepr-piper:gpu-78e890bd-pkg-4b50a39d-dev-229fa339a0addd932366be2325401a4d395df4ab-pr-15

[LinuxServer-CI]

I am a bot, here is the pushed image/manifest for this PR:

ghcr.io/linuxserver/lspipepr-piper:gpu-78e890bd-pkg-38a0ed00-dev-2988717ac39403bb26f0294d0937b6f4255ab4a4-pr-15

[LinuxServer-CI]

I am a bot, here is the pushed image/manifest for this PR:

ghcr.io/linuxserver/lspipepr-piper:gpu-78e890bd-pkg-65e0214c-dev-642c39818bc2e59d17ce3695548f7c0fb9441036-pr-15

[LinuxServer-CI]

I am a bot, here are the test results for this PR:
https://ci-tests.linuxserver.io/lspipepr/piper/gpu-2.1.2-pkg-75b30581-dev-f7af9920f05eb6724a20d3255bda8f34d8989c94-pr-15/index.html
https://ci-tests.linuxserver.io/lspipepr/piper/gpu-2.1.2-pkg-75b30581-dev-f7af9920f05eb6724a20d3255bda8f34d8989c94-pr-15/shellcheck-result.xml

Tag	Passed
gpu-2.1.2-pkg-75b30581-dev-f7af9920f05eb6724a20d3255bda8f34d8989c94-pr-15	✅