feat: Add use of bnd plugin to gen OSGi meta-data as per issue #318

[scottslewis]

This pr adds usage of bnd plugin to generate OSGi metadata for the mutiny-zero-flow-adapters module.

In my snapshot build on local machine this is the generated manifest.mf contents:

Manifest-Version: 1.0
Created-By: 21.0.10 (Eclipse Adoptium)
Build-Jdk-Spec: 21
Specification-Title: SmallRye Mutiny Zero JDK Flow / Reactive Streams Ad
 apters
Specification-Version: 1.2
Specification-Vendor: SmallRye
Implementation-Title: SmallRye Mutiny Zero JDK Flow / Reactive Streams A
 dapters
Implementation-Version: 1.2.1-SNAPSHOT
Implementation-Vendor: SmallRye
Implementation-URL: https://smallrye.io
Java-Version: 21.0.10
Scm-Connection: scm:git:git@github.com:smallrye/smallrye-mutiny-zero.git
 /mutiny-zero-flow-adapters
Scm-Revision: 
Scm-Url: https://github.com/smallrye/smallrye-mutiny-zero/mutiny-zero-fl
 ow-adapters
Bnd-LastModified: 1774486047451
Bundle-Description: Adapters from/to JDK Flow and Reactive Streams
Bundle-Developers: jponge;email="julien[AT]ponge[DOT]org";name="Julien P
 onge"
Bundle-DocURL: https://smallrye.io
Bundle-License: Apache License, Version 2.0;link="https://www.apache.org
 /licenses/LICENSE-2.0.txt"
Bundle-ManifestVersion: 2
Bundle-Name: Bundle io.smallrye.reactive : mutiny-zero-flow-adapters
Bundle-SCM: url="https://github.com/smallrye/smallrye-mutiny-zero/mutiny
 -zero-flow-adapters",connection="scm:git:git@github.com:smallrye/smallr
 ye-mutiny-zero.git/mutiny-zero-flow-adapters",developer-connection="scm
 :git:git@github.com:smallrye/smallrye-mutiny-zero.git/mutiny-zero-flow-
 adapters",tag=HEAD
Bundle-SymbolicName: io.smallrye.mutiny.zero.flow.adapters
Bundle-Vendor: SmallRye
Bundle-Version: 1.2.1.SNAPSHOT
Export-Package: mutiny.zero.flow.adapters;version="1.2.1.SNAPSHOT",mutin
 y.zero.flow.adapters.common;version="1.2.1.SNAPSHOT",mutiny.zero.flow.a
 dapters.toflow;version="1.2.1.SNAPSHOT",mutiny.zero.flow.adapters.tors;
 version="1.2.1.SNAPSHOT"
Import-Package: org.jspecify.annotations;version="[1.0,2)",org.reactives
 treams;version="[1.0,2)"
Require-Capability: osgi.ee;filter:="(&(osgi.ee=JavaSE)(version=17))"
Tool: Bnd-7.2.1.202601121903

This metadata uses the same Bundle-SymbolicName as is found in the module-info.java...i.e.: io.smallrye.mutiny.zero.flow.adapters.