Support SIYUAN_WORKSPACE_PATH in Docker

[luke-zhu]

The current entrypoint fails if the user uses
--workspace /my/workspace with a space instead
of an equals.

This change supports that format as well as the
SIYUAN_WORKSPACE_PATH env variable.

SIYUAN_WORKSPACE_PATH=/should/be/ignored ./stuff.sh --workspace /my/workspace --workspace-prefix --fla g-equal=3 --flag-no-equal 4
WORKSPACE_DIR: /my/workspace
ARGS:  --workspace-prefix --flag-equal=3 --flag-no-equal 4

SIYUAN_WORKSPACE_PATH=/my/workspace ./stuff.sh --workspace-prefix --flag-equal=3 --flag-no-equal
4
WORKSPACE_DIR: /siyuan/workspace
ARGS:  --workspace-prefix --flag-equal=3 --flag-no-equal 4

SIYUAN_WORKSPACE_PATH=/should/be/ignored ./stuff.sh --workspace=/my/workspace --workspace-prefix --fla g-equal=3 --flag-no-equal 4
WORKSPACE_DIR: /my/workspace
ARGS:  --workspace-prefix --fla g-equal=3 --flag-no-equal 4

Feature or bug? 特性或者缺陷？

Bug fix

Multilingual or copywriting? 多语言或者文案？

Please submit directly, we will evaluate.
请直接提交，我们会进行评估。

Dev branch!

[github-actions]

Your PR was set to target master, PRs should be target dev
The base branch of this PR has been automatically changed to dev, please check that there are no merge conflicts

[88250]

Hi, to maintain consistency with other parameters (using =), this PR is not considered for merging, thank you.

[luke-zhu]

Ok, well you still have the problem if the user uses SIYUAN_WORKSPACE_PATH

[88250]

What you said makes sense. Can we just change SIYUAN_WORKSPACE_PATH support without changing =?

[luke-zhu]

Sure, I have updated the commit and the PR title

[luke-zhu]

#14286