Simple Build Extensibility - Pass project namespace to custom tasks

[matz3]

Expected Behavior

A custom task (see "Simple Build Extensibility" #54) should also receive relevant project properties like the namespace.

Current Behavior

Currently it is not possible to consume the application namespace of the project being built within a custom task.
This limits certain possibilities to directly lookup files within the project namespace.

Context

• UI5 Module Version (output of ui5 --version when using the CLI): v1.4.3
• Node.js Version: {...}
• npm Version: {...}
• OS/Platform: {...}
• Browser (if relevant): {...}
• Other information: {...}

Affected components (if known)

• ui5-builder
• ui5-server
• ui5-cli
• ui5-fs
• ui5-project
• ui5-logger

Log Output / Stack Trace

{...}